Dates

October 17-21, 2025

Participants

536

Highlights:

• Most of us (80%) have dots on our lenses, but they don't always serve the same purpose.
• The most common use of left/right dotting is one dot on the right and two dots on the left. Other methods of telling right from left included one lens being tinted or the lenses having other distinguishing features.
• The most common placement of orientation dotting is on the bottom (58%).
• 55% of participants said their dots are used both for left/right identification and for orientation (leaving the implication that up to 45% may have "rotational" lenses).
• More than half of participants (53%) have had issues with dots wearing off. Some (15%) have experienced this repeatedly.

As we know (and this survey clearly confirmed), there is no industry standard for lens markings, but some practices are clearly more common than others. We encourage everyone who is unsure about their dots to ask their provider to confirm what the dots (if any) on their lenses mean.

The only really surprising thing about the survey results was the level of participation. This was our most popular survey in years and a large number of people took the time to add comments. Clearly, dots matter to our community.

Got dots?

What are the dots for?

Orientation = helps ensure I rotate my lens to the correct position (not all lenses require orientation)

Identification = helps me tell the left from light lenses if I ever get them mixed up

If you have ORIENTATION dots, where are they located?

Do your dots ever wear off or become difficult to see?

How do you solve that problem?

Telling left and right lenses apart

Here's how participants identify their RIGHT lens:

Here's how participants identify their LEFT lens:

Here's how often participants have experienced difficulty telling right and left lenses apart:

Do your sclerals have a serial number on them?

Participant comments

About how to tell lenses apart

• Because the dot on the right lens wears off after a month I have a routine. At night I take the right lens out first always then in the AM I put the left lens in 1st. 
• LEFT: Tinted Blue with 1 dot, RIGHT: No Tint with 2 dots
• The curvature is pretty different between the two, so I can tell just by looking.
• Wore them home from Dr. and just continued to put into appropriate labeled R/L cases
• I just keep them separated and have had no need for a dot.  the lenses came with a dot which was gone in about two days.
• I just try to keep them straight, and I am certain I have swapped them in the past.
• Both Lenses have orentation dots and the right one is tinted blue.  When the dot wears off I can see the serial number of the lens if I hold it up to a White Computer Screen.
• Right is white (clear); left is blue
• It has no dot.
• Keep them on separate sides of the Clear Care basket at night. 
• I just have to not get them mixed up.  
• Its the one "not" tinted in blue
• One lens has a dot because it has a specific orientation (a micro vault for pinguecula). The other has no dot and is a slightly different tint. 
• No dot on right lens
• once i’m told which is right or left. I make sure to put them in and take them out same order every time always the left firdt
• I can tell because my left eye has more severe keratoconus and requires a lens with a more extreme arc. 
• I always put the left lens in the white side of the disinfection case and the right in the blue
• This works for PROSE.  It dies not wirk fir EYEPrint (no dots). 
• Right eye is clear 
• I wear sclerals lenses not due to dry eye syndrome.  I am a kerataconus patient with 2 corneal grafts.  The graft shapes are very different, and the lenses can immediately be recognized by their different shapes.
• Cleaning container (Clear Care) has identifying labels on the cleaning chamber.
• Right one’s is clear 
• just by fit and the correction
• Right Contacts’s has one dot and tinted light blue. Left contact, one dot and clear 
• my left lens is always just clear
• I keep the right one in the right side of case 
• The dots show the orientation I need to insert them.  The right one has a black dot, and the left has a red dot.  The red dot is faint and harder to see, so I insert that lens first.
• i pnly have a right prosthetic lens
• The dot on the Right Lens disappeared after a few months..
• I match the serial number on the lens with the bottle the manufacturer sent them in. My google pixel 8a camera magnifies enough to take a really clear photo of it 
• Left lens is also tinted blue
• "My left lens has a blue tint (I remember L for left), My right lens is clear. Nobody seems to notice the slight tint change between my eyes.
• I sure wish Clear Care vials were marked the same way. They use Blue for the right eye, White for the left eye. Makes no sense."
• Left lens red dot, right lens black dot and odd shape
• I take right one out first and put in in the blue side of the clear care lens holder
• When I take out my right lens I place it in the white side of the lens case . I remember which is which by thinking “ white is right” 
• My left lens has L and my right lens has R
• My left lens has a light blue tint, while my right lens has no tint and is clear
• Current pair: Right lens is clear with no markings;  left lens is VERY FAINTLY tinted blue.  Not super happy with this setup (nor was my doctor. My first/previous pair had one dot on the R and two dots on the L and the L lens was more strongly tinted blue.  It irks me that companies who are producing products for people with imperfect or impaired vision are not paying attention to how the user will be able to properly use/differentiate the lenses.  Not just lenses. Solution manufacturers frequently use safety wraps that are the same color as the lid (Boston Advance, ahem) that are difficult to see once you have your contacts out. 
• I had corneas transplant. Left lens is flat compared to right lens
• No dot
• Right blue, left clear (just like the caps on lens cases)
• I have mono vision lenses, so it’s easy for me to tell which lens goes in which eye. The dots wear off about two months after they are applied by the optometrist.
• The right dot is dark black. The left dot is pale orange
• My right has one dot and left has none
• They're different sizes
• The also are color coded
• You can use a marker designed for lenses like STAEDTLER Lumocolor special to add dots back, and they last for a good long while before needing a refresh.
• L and R are engraved on each lens
• My dots faded after a few weeks.  I look for the serial number to make sure they're right side up.  Otherwise, I am very careful in putting them in left and right palces.
• There are no marks on the lenses. I just need to be careful when handling them. I did mix them up once and was able to tell because of my vision.  Both lenses are multifocal, but the left lens is for distance. 
• I have PROSE lenses. Each is marked eith a black dot on top. I can tell them apart because the left has 4 channels and the right has.no channels. 
• Right is black. Left is red.
• I am just very methodical about storing them in order. Would prefer a dot that didn't wear off in cleaning
• The word right has one “I” and the word left has no “I”s. 
• There are no identifying markings on my lenses. Therefore I must be very aware when taking them out to place them in the proper case. I've never really thought about this until now.
• I am very careful when I store them to put them in the correct baskets. 
• It has no dot
• Right one has one dot… “Right One “
• It is clear
• My right one is steeper inside, the left is flatter.
• Right lens black dot six o’clock. Left lens two red dots six o’clock, but the colour quickly washes off then they’re clear dots. Also, red is not a good colour when it matches in the veins in the eyes…
• My left lens is 2mm larger than my right lens.  
• I only use one lens
• Left lens has hash marks (due to the way it needs to be oriented to fit correctly) in addition to two dots, so mine are very easy to tell apart!
• R lens one dot. L lens, no dot. 
• The left lens has a blue tint and the right no tinting.
• I only have my left eye that I can see. So I don't need anything special. When I could see from both eyes,  i had light blue in left and light Grey in right
• It is clear left is tinted
• It is clear 
• Right is also yellow and left is light blue
• I only have a right lens 
• I have double dots on my left, which is also light blue 
• I always insert and remove my lenses in the same order. In addition, the prescriptions are different so it is evident if they are in the wrong eye.
• Only right one has a dot so obviously the other is the left one
• I always put my right eye lense in the right part of the lense case and the left eye lense in the left part of my lense case. 
• left lens has no dot
• No dot
• Right eye lense in right side of lense case and left eye lense in left side of lense case
• Right lens has a notch to go around a pinqecula
• When I insert them I can tell if they are in the correct eye by my vision. 
• I cannot see the dots, make sure I use white for right in storage container
• The right is much stronger so if I put the wrong one in, I know instantly.
• No marks!
• I ONLY wear a right lens right now.  I'm VERY careful to put them in the correctly marked R holder side
• My right lense is clear, left lens is tinted blue
• My right lense is clear
• I’ve never mixed them up. 
• Since the RIGHT lens has one dot. The OTHER lens is the LEFT lens.
• I have a blue tint and 2 dots at the top 
• only have one lens 
• I always start with the left lens whenever I am inserting and/or removing both lenses. I'm also very careful to position the left side of my lens case on the left.  I never use a lens case that does not distinguish the left and right sides.
• Left lens seems to have more of a curve then the right. 
• Right is clear
• It has no dot since right on has a dot.
• "no dot on left
• I always put them in a lense holder with two different colors.  Then I always know Left is in the grey one and right is in the white. No problem font need to know what fits mean.
• My right lens is clear and my left is tinted light blue.
• The lenes are physically different and noticeably so.  In the case of the left lens, it is steeper than the right.  Also it's very uncomfortable if I insert a lens into the wrong eye
• Has L and Ready 
• Right lens has no dot.
• 2 dots bLue Left. .  ... . . . one dot cleaR right
• My right lens is clear.
• left is tinted lt blue, right is clear
• Ones a scleral, ones not
• The right lens is not tinted blue
• No marking on left lens
• I always start everything with my left eye/sclarel lens
• L lens is custom, smaller, & light blue. R lens is clear, larger.
• My right lens has a dot and left has none. That is how I tell them apart. 
• My lenses used to have one/two dots.  The dots have worn away over time.
• Previous lenses where tinted blue only on the left lens.  Current pair are both tinted blue, with no other obvious distinctions.  This did cause some initial confusion, but I now rely on a lens case that has a blue lid for the right lens and a white lid with marked dots for the left.
• No matter what my optometrist orders ( 4+ years) the manufacturer puts dots on both lens. She finally gave up and ordered blue for my right.  
• Right lens has black dot, left lens has red dot.
• Shaped differently 
• I have multiple sets from over the years  some had left lens tinted blue. Recently, the right lens with the dot. It is my understanding it is doctor choice when ordering. 
• I take good care and they have different vision!  So a good sign if I put wrong one in. But never have!
• I also use cases that have a color for right and white for left.
• Very careful when taking them out
• The lenses are the same prescription so for me it doesn’t  if I accidentally mix them up
• Right is clear, left is blue
• There's no way to tell them apart unless they go in the wrong eye. Left for far, right for near vision. 
• I was told to always start with the right eye. So that is what I do.
• I just paid attention when I took the first one out of the packaging that had "right" on it.  I'm careful when I take them out to always start with the right and to always put it in the blue side of the cleaning vial.
• there are no identifying features on my lenses and I can only tell the apart if I put the wrong one in because it doesn’t fit 
• Only my right lens has a dot, the left is blank
• right lens. No dots.
• I only have a right sclera lens because I’m legally blind in the left
• I remember that ‘white is right’, so the right lens goes in the white cleaner basket, left in the blue side. I mixed them up once, my vision was blurry and so I looked at the dots and then confirmed the designation on the internet 
• Only my right has a dot. It is also the lens that has signiificant well and off center. If I put the right in my left eye, the vision and comfort is off. The left has a more normal looking well. Because I see better after my left lens is in, I always start with the left. Taking out and putting in. I also never open the right side lens case until I'm done with the left. My lens also help me see distance rather than close up, so putting the right in does me no good. 
• No dot 
• The right has hash and writing on right side. The left has a hash and writing on left side. Both have one dot on the bottom.
• The LEFT lens is clear
• It has a red dot
• Be careful not to mix them up. Assess my vision. 
• My right lens is tinted blue and the left lens is clear.
• I had a right lens with a dot then my new lenses had no dot. I mixed up the unmarked lenses. Very frustrating.
• My right lens is clear, but the left is tinted blue. The dot or line is more exaggerated on the left lens.
• it has no dot on the left lens
• I used to have a dot on my right lens. It has worn off with use of Progent, but I keep the right lens in the blue side of the cleaning case, the left in the white side. I haven't mixed them up yet.   
• I always remember to put in the RIGHT ONE. (Right=one dot)
• Pure luck and never mixing them up :/ 
• My vision is worse in my right eye. If I put the in the wrong side, that is the only way I would know.
• My right lens has a dot, my left lens has No dot. I’ve had 4 pairs of sclerals. One of my pair of lenses had a dot on both lenses, so there was no way to tell them apart except that I tried to always use the same routine inserting and removing them. Occasionally I would mix up the set that had two dots (the mix up usually happened when I treated my lenses with Tangible Boost. ) . It was obvious when I tried to insert the left lens in my right eye that it would not fit so I was able to figure out which lens was which pretty quickly,  When only one of my lenses have had a dot, I have never had a problem telling the lenses apart.  
• Right has no dot, left has one dot
• "    When I wore PROSE lenses, one lens had one dot, and the other lens had two dots. I forget which was which. When the dots wore off, Boston Sight, then Boston Foundation for Sight, reapplied the dots. I was without Prose during this process which required mailing the lens to Boston, BFS reapplied the dots and mailed them back.
•      When I first started wearing Scleral lens, they lacked any identifying feature on them. Later lenses the left lens was tinted blue which I am unable to see. I have relied on always removing the right and inserting the right lens first. My first lens cases had a blue lid for the right lens; so, I always put the right lens in the blue side of the PROSE case. Several times I inserted scleral lens in the incorrect eye or inserted both into the same eye. I only found when the doctor told me I had them in the wrong eye.
• My left has a vault added which creates a slight divot in the edge.
• My right lens has an indentation at the bottom while the left lens has 2 dots at top
• Very careful when taking them out And putting them in the case. The prescriptions are different so that helps if I put them in the wrong eye
• L lens has a dot; R lens is clear and unmarked
• I am very careful to ALWAYS care for my R Lens first. I can tell which side is up because there are small numbers at the top with a small dash at 9 and 3 o’clock. I know it’s in the correct eye in the correct position because the pain is unbearable when it is not placed correctly.
• Left dot is red and right dot is blue. It flakes at “6 o’clock” for astigmatism orientation 
• "My right lens is identified with a black dot on the bottom of the lens at 6 o'clock. 
• My left lens is identified with a red dot on the bottom the lens at 6 o'clock. "
• Left is blue, right is not
• I am very careful and always put the left one in the clear side of the case and the right one in the blue side of the case.  If I get them mixed up there is a very tiny engraved number L27 on the left and r26 on the right.  I bought a jewelers loop so I can read these tiny numbers
• Doesn’t have a dot
• I very seldom wear these anymore. It’s too hard to put in and because I’m almost legally blind, I can’t see the dot anyway
• Left lens has a line. Right lens has one dot
• My left is tinted blue
• I always work with the right eye first, and only  remove them from my eye or case one at a time. 
• My right lens is clear
• Only use left lens 
• Right lens is clear (without a dot or a tint) and the left lens is tinted blue
• I only wear a left lens
• In addition to the dots my providor has also ordered the right lens with a blue tent
• No tint on right lense
• I do not have a lens for my right eye, only my left.
• left is tinted blue
• I would love to have some marker. Both my lenses are blue. No dots. No system. Dumb
• Left has no dot
• Used to have green tint on right lens (gReen) and blue tint on left lens (bLue) but not many lenses in green these days.
• Right clear left blue
• "No visible distinguishing mark.  According to the eye doctor there is an R and L on each lens, but it isn't visible without his equipment.
• If I do mix them up, I know right away because the prescriptions are so different, I can see terribly from the eye right after I put the first one in. "
• Left lenses should has lines
• My left lens is tinted light blue and my right lens doesn’t need an identifier because it’s the one not tinted.
• My left lens has BOTH two dots and a blue tint - very helpful to me
• Lens case covers identify L & R and are also color coded.
• The new right lens has 1 dot which washes off after one insertion   The left lens never identified 
• My left lens has no identifier, or orienter as to top or bottom. 
• My provider always tints the left lens blue!!  And for me, since my vision is so poor, he has the lab put three orientation dots at the bottom - the left one is a triangle and the right one is in a vertical line.
• There is a crater at 1pm on my Right lens
• I only wear one scleral lens, due to herpes simplex caused cornea damage.  The dot wore off long ago, but I use the row of tiny identification numbers along one edge to guide me in orientation, although I'm not sure I'm interpreting that right.
• My vision is different since left lens is for reading 
• I only use 1 scleral lens as my other eye is blind. My vision is so poor with my one eye that there is no way I can see the dot.. I think I recall my eye doctor saying the ideal position to insert it was indicated by the for.
• There is no dot on the left lens
• Right lens has a black dot and left lens has a red dot
• I've worn gas perm & scaleral lens for 60 years & have always had a dot on my right lens!
• I only wear a scleral lens in my right eye
• the one without the dot is the left one
• Left lens has an L
• My left contact is a lot more bulged out than the right
• My left Scleral Lens Is shaped massively different than the right. I know it is the left lens by looking at how funky the shape is. The right lens is a more normal circular looking lens. 
• One has multifocal dots
• My left lens has 2 dots and is tinted blue
• Left contact is thicker
• The cleaner carrier that hold them is color coded Blue for right and white for left
• I add to the dot with a sharpie and use reading glasses
• No markings both are the same. I got them confused once and could only tell by my vision
• One has an L and one has an R etched on it. 
• My left lens has channels. My right does not. 
• Only use lense in left eye 
• My right lens has a vault.  So, I don't have an issue with mixing right and left lens.  The dot on either lens is primarily to help me with insertion.  The dots are both at the six o'clock position.  
• Right one is clear left is tinted blue
• it's clear instead of the blue right one
• There is no feature. I use the Clean n Clear baskets so I never get confused.  Been using the other RGPs for 30 years.
• My left len doesn't have anything on it
• RIGHT has barely visible dot but is palpably deeper (concave) than LEFT which has no dot but is more shallow.
• The prescriptions are quite different! If I put them in the wrong eyes, I can't see.   Otherwise, the lenses look exactly the same.
• When I get the lenses mixed up I can tell by my vision being off.
• Mine has neither. I have mixed them up before and when it bothers me all day I switch them out 
• My right lens is older and from a different manufacturer than my left lens. It has no dots nor any color. It is a completely clear lens from Valley Contax.
• "L" etched at the edge of the Left lens, "R" etched at the edge of the right
• Only have 1 lens due to cornia transplant
• It is plain 
• I don't. If it feels uncomfortable,  I try to insert them again. 
• They have a different prescription so I need to put them in the correct side of the case. 
• My left lens is light blue; right lens, clear. No dots, though have had them in the past. They wore off very fast.
• my left lens had no dot- only my right lens
• My left eye needs the dots down to fit well. The right lens doesnt matter. I have a 35+ year old cornea graft in my left eye and its reached the end of its useful life . (KC came back)
• I only have one lens 
• If I mix them up, I just put them in and if my vision is weird, I know they're switched!
• I can also tell by how I see when I put them in, different rx in each eye
• My right lens has a notch for a blood vessel. There are no dots or any other indicators of right and left. 
• I only have a left 
• Right lenses is clear. Left lense is blue because both words have an L in it
• Right eye is steeper than the left,  thus the right lens is taller than the other 
• No dot
• If I get them mixed up, it's pretty evident when I put it because my vision is very different in both eyes.
• Shape
• I try and keep them apart. If I don't they are different prescriptions and I know as soon as I put them in .
• I just am very careful about which lens go into which case.

2. About experiences with lens dots and telling left from right

• All lenses should have one lens tinted 
• R lens dir came off within a couple of days and L lens wasn’t far behind. I use clear care nightly 
• If the dot wears off, there is a slight indent where the dot is that I can tell.
• they can be remarked with a sharpe felt, although that will require reapplication, but it works.
• No but I’m glad I’m not looking for dots 
• Its hard to find them when the background is not white.  
• On the second day with new lenses, I thought the dots were coffee grounds, as I had ground coffee just before washing my hands to handle the lenses.  rubbing with Unique pH did nothing.  Luckily, I called my Optometrist’s office before I fretted too much.  They hadn’t told me that the new lenses featured the dots for left/right identification.
• I wish the blue dot on the right lens didn't fade out. Sclerafil is the only solution I can use. 
• Works great for me
• The lenses should be tinted blue.  EyePrint should have dots and a readable serial number.   
• The right lens lost its dot but I'm due for a new Rx next year.  The left lense has 2 very clear dots.
• The dots should be at 12:00
• If I accidently swap the lenses, it can be hard for me to tell while I am wearing them
• It’s getting harder and harder to see dots as eye sight declines
• It would be nice for simple universal mark for R versus left lens
• I would like it to have a dark tint on side and add the dot. But grateful just to have my vision with these lenses 
• My recent pair has white dots, but they are not easy to see. But helpful, because my other pair have blue dots and I can’t confuse them.  
• My doctors assistant explained to me that the left lense is blue and to associate it with the number of letters (blue/left)
• Need bigger more permanent dots for orientation 
• My dot is worn off so I just am really careful to always put them in the right case, l or r.  Mine are also monvision, so I can tell when I put them in if they aren't right
• I love my sclerals
• I know that my doctor can look at the serial numbers if necessary.
• I would know immediately since the vision in my left eye is worse. I’m not able to see clearly if I mix them up.
• I prefer one dot on my right lense.
• It's really not hard if you put them in the case correctly!
• I have Ovitz, so my right lens feels significantly different from my left. At this point, I only use the dots for orientation 
• Any help would be appreciating
• I have worn them for years and only recently found out about orientation.  Has made a big difference.  
• Dots also show orientation. Right lens on top. Left lens dots on bottom.
• My first lenses were a different brand and did not have dots.  I would occasionally accidentally mix them up.   The Boston Sight lenses always have dots and that really helps.  
• Interestingly, I can see well out of my left eye with the right lens, but the vision in my right eye is blurry with the left lens.
• I can tell immediately if I put them in the wrong eyes.
• My Doctor’s office (Miami Contact Lens Institute) does an excellent job explaining lens insertion and options for identifying lenses.  
• The dots come off faster using the clear care system because of the bubbling.  Been told by eye Dr to re-mark with a shape on the OUTSIDE of the lens
• Lens cases sometimes label right and left and color code right blue, but the left tint is blue. I am super myopic and dyscalculic, and the case not aligning with the lenses can really throw me. I try never to have color coded lenses
• My provider stated there is a serial number on my lens but I can’t see that.  I get new lens every 2 years now.  I had waited to get new lens when the dots wore off, it had been 4 years I believe.
• A dot is very necessary to tell right from left.  I wish it was larger though. 
• They can make it whatever you want
• The dots as put on by the maker (Canadian firm) are too small to see. Even if the dots were bigger, they are so faint as to still be difficult to read. If I could read without lens help, I wouldn’t need lenses! My doctor has to put big dots on the lenses. The dots wear off.  
• even with my dots worn off there were small impressions I could see when I held it up to a light. My optometrist remarked them, but with the hydraglide solution it lasted maybe a couple days. The original manufacturer dots lasted a lot longer, but did still wear off. Trying tangible now and hoping they don’t wear off.
• The black dot itself does wear off, but there's still an etching that I can see in the right light. 
• I think it would be great for this to be the standard.
• "When they are not in my eyes, they are in the Clear Care case which is blue and white.  Once in a great while, I will put the right in left side and vice versa.  When I put my contacts back in my eyes, I can tell I have them switched due to not being able to clearly see.
• I do wish the dots had remained on the lenses and not disappeared over time."
• Mine have totally warn off and I struggle to figure out which is which and what the right orientation is
• After I moved and had to reestablish with a doctor, I had to switch eye doctor because the lab they used could never get the fit right. I deliberately found a doctor that used the lab I was used to. 
• Need strong readers to see the dang dots!
• I think when the right dot is at the bottom, the lens fits better and I don't have to take it and adjust as often. I wish I could see it and maybe it has worn off and I don't know it. I used to use an B&L bottle where I cut the nozzle off and put the plunger in the hole as a stand. Because the bottle was white, I could see the dot. I use a stand from Dry Eye (clear one) and no longe see the dot.
• I wish I had a way to differentiate the left from right.  
• Actually on the rare occasion I have mixed mine up, they won't sit on my eye and immediately pop out.
• The lenses need one lenses with a dot.
• Dots wear  out every 3 months.  I have to have Boston Sight condition and re-blacken the dots.
• Sharpie Industrial fine point- works well for long lasting dots.
• It had a dot but it wears off so fast. One pair - once had an etched dot on it. That was awesome, really wish they would do that again. I believe it was the first year of covid that it was etched.
• I wish one lens was tinted!
• Blue tint is my personal preference over dots. 
• My doctor said she will have the lens maker dot my lenses the next time she orders new lenses.
• " I had to ask Dr how to tell what orientation I should install the left lense since it has no dot. She said the serial number should be at 12:00.
• The whole ""dot"" thing is incredibly frustrating, the dots frequently wear off with cleaning and I find myself having to redo the dot every 1-2 weeks or sooner. It would be nice if the dots were permanent. Meaning actually built into the lense and not just a drill hole requiring manual ink."
• I like the dots. They help to easily tell L from R lens and also help with lens orientation, which is more important to me to get right, and be able to confirm, in my L eye. I do NOT like a blue-tinted lens and always request no tint.
• My eye dr said not to worry about the dots, said they’d wear off and he wasn’t interested in refitting the, because we’d have to do it every few weeks. Pay attention, and use your handedness (right handed, right contact first) as a guide. I wore gas perm lenses for years before sclerals and did my right eye first all these years.
• My sterilization cage is color coded so I always use the blue side for the right lens and the white side for the left lens. That helps to keep them straight. The dots are useful for positioning the lenses on my eyes. 
• Wouldn't it make sense to identify the Right lens with a RED dot (red for RIGHT). And have no identifier on the left - unless it's needed for positioning purposes. 
• I’m new. Literally day 10 so unsure about wearing off of dot or lines 
• Thank goodness for the internet. Now I mark the lids to the cases with a sharpie 
• The blue tint makes it very easy for me to distinguish between left and right lenses.
• My lenses were marked by my doctor with a sharpie.
• My lenses Rx is complex, and the orientation of my dot has one at the bottom and the other at about 1 o'clock. I can tell if they are in the wrong position as my vision is slightly blurry, especially for reading.
• "one tinted lens makes it easy to tell them apart
• I am glad you are addressing this - it is a problem.
• Any other brand has had ineffective markings
• The blue tint in one lens helps immensely. It is easier to see than the dots and doesn’t wear off. 
• Lens alignment after dot wears off: Serial numbers on top
• Before the dot washed away it was very visible and unsettling to see. 
• I was told to use a Sharpie to redo the dots when they start getting too light. 
• The dots are getting very faint. I wonder how to refresh them.
• I regularly “recondition “ my sclerals at BostonSight. They make them slippery (and thus more comfortable) and they re-do the dots. I do this every 3 months. I live close by so I drive and pick up, but they also have a mailing option.
• I went through a period of time when my dots were always coming off and it was making me crazy!!  My Dr. figured out that it was the multipurpose cleaning solution that I was using that was doing it!!  I changed from Unique pH (which I absolutely loved) to Boston Simplus and never had the problem again!
• This has always been confusing to me!  Dots have always worn off quickly so haven't been helpful with orientation.  That's why I use the serial numbers (if available).
• I guess there should have been a not apply option for those of us that have only one eye with sight
• We are trying "no coating" this time for our daughter who has autism (that's why I'm completing the survey). The last two sets of contacts would get terrible build up. They did not have dots either which made telling them apart difficult. This time we are trying no coating, and there is a blue dot on the left lens. Hoping the no coating works for us!
• My first pair the dots were too light and I mixed them up often. My second pair is very bold and easy to see. 
• I always follow the same routine for inserting and removing. First right lens then left lens
• "Dots on one pair became worn after 2 year's use. 
• My lenses are adjusted for distance, so the second dot(s) becomes hard to see for orientation purposes once I insert the first lens!"
• Sometimes it is hard for me to see the dots with my naked eye
• I wish one could be color 
• On my first pair of lenses I had a dot to separate the left from the right, but the newer ones are fitted to my eyes better so I need the dots for orientation. 
• Doc told me this brand can't tint blue when they are bigger than 17mm 
• As my vision has changed, it has become more difficult seeing the right lens dot and I worry that it could become a problem in the future
• Only use one lense 
• They come off when I use Progent, which I need due to protein deposits
• Taking them out I always open the Right basket first.  It's a process so I don't think I will confuse them.
• Yes, it's better than having one of my eyes blue when the other one is brown,  people could tell
• I was given a left lens that was blue when I replaced it recently. Id was not asked if I wanted this and I didn't like the way it looked to have one eye be different than the other and I returned it to be replaced.
• The left lens has a serial number on it. Also despite being as careful as I can to orient the lens so the dots are on top I am almost never successful. It seems to me that the lens rotates in my eye as it is being put in and almost always ends up somewhere other than at the top. My vision is good and the lens is comfortable but I wonder about how necessary the dots are since the contact rarely ever ends up in the correct position 
• Without the dots i would be lost!!
• Would very much like better dots and independent lens identifiers/serial numbers.  Or, better self-repotting method than using sharpie ink.
• I have once put both lenses together for over night cleaning , they stuck together and I ended up putting them together in my right eye. Vision wasn't quite right, and was worried that I lost the left. was going to take the right out to rub, when i tok it out the right lens was still in place.
• Dots are terrible, color is better
• I believe the dot on the R lens was put on at the doc's office.  I have actually put a dot on the R lens of my spare set using a permanent sharpie!
• I always take off and insert left then right.
• Asked doctor about fading blue dots on my lenes. He recommended re-marking/dotting them with a dot from a "felt tip" marker. Believe he said had most success with a Staedtler brand marker. 
• Dots wear off after soaking in unique ph,  if just rub few drops and rinse dots stay if soaked in unique ph come off, happened 3x when I was being fitted for final pair. Soaking in clear care has no problem with dots staying on
• Survey is not totally inclusive especially for only one lens .  My mark is at 2:00 o’clock so not all are top and bottom 
• The last time I had a dot was 40 years ago.  Single dot on right lens. My Optometrist manufactured RGP's on site. His lenses he indented the lens, then dropped the black dye for the dot. Before DALK in both eyes, lenses were different sizes in both diameter and height.  In the 48 years wearing lenses, never mixed them up.
• A tint might be better so that others looking at you cannot see the dot.
• I actually prefer a dot on one of the lenses to tell them apart but if I do get them mixed up, I will know right away after insertion!
• The correction levels  are different which helps if I put in wrong eye