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reallyzen ,
@reallyzen@lemmy.ml avatar

Next time ask your lenses without. Mines are the same, I have a new prescription & just told the shop “no”. No anti-blue, no ant-reflection, no nothing, just the hardest material available.

deranger ,

Antiglare coating is a must for me. There’s a reason it’s used on lenses in cameras; it enhances contrast, and for purely aesthetic reasons, makes it easier for others to see your eyes, making you look better.

High index plastic is also great IMO, it significantly reduces the thickness and weight of the lenses. Also aesthetically, it reduces the distortion of the sides of your face when someone’s looking at you. It is not the hardest material available, and I believe the higher the index, the less hard they are. My lenses are typically completely scratch free for a year or two, getting only minor scratches after that.

I’ve never had an issue with coatings. I clean my glasses with hot water and Kimwipes (laboratory lint free wipes). I don’t use any lens cleaners or any other cleaning products. I never dry wipe my lenses.

Akrenion ,

Hot water and excessive heat from cooking can crack the coating.

clif ,

I haven’t read the manual but I don’t think you’re supposed to cook your glasses.

deranger ,

I’m not taking about boiling, just hot out of the tap. It helps gently heat the lenses so they dry faster after being wiped.

thejoker954 ,

I buy my glasses cheap off the internet and wear em till they are broken. They last me years and I’ve never had any coatings come off like this.

I am now super curious if it’s something OP did, or if it’s a processing error (maybe technician put the coatings on in the wrong order) or what.

yokonzo OP ,

I thought I have been pretty careful with them, I did accidentally go swimming in saltwater with them but they were untouched once I realized and sprayed with purified water after, this was also after I realized the coating was coming off but it probably didn’t help

Extrasvhx9he ,

Not really related to the post but how was the process of getting them off the internet? The cheapest price I can get would run me around 200USD for the whole deal: eye exam, new lenses and the specific frames I want. Hell if I can save money though I’m willing to try online

BearOfaTime ,

I find glasses online are about half the price of a local place. $500+ locally, about $250 online for the same thing. Progressives drive most of the cost.

If you can get am exam locally for a good price, you’re good to go. Just make sure they include the PD - Pupillary Distance, they sometimes don’t, though it’s part of your prescription and they’re required to supply it.

thejoker954 ,

Pretty easy honestly. Pick the frames you like, enter in your prescription, choose lens options like transitions/anti glare then pay and you get em in a couple days to a couple weeks depending.

Just like anything else shop around - some of the “cheap” online places still charge a ridiculous amount.

Name brand doesn’t mean much either - for example - generic transition lens coating works just as well as the name brand stuff for most applications for a fraction of the price.

over_clox , (edited )

Unfortunately that wasn’t an option at Walmart the last time I got glasses. I wanted to go to my old eye doctor instead of Walmart, but that was during the COVID lockdown shit and I would have had to wait like 3 months.

Sigh, this coating shit sucks ☹️

velox_vulnus ,

Anti-blue coating is stupid, but anti-reflection isn’t. Makes everything easier to read. I think it’s probably the anti-blue coating that ruins lenses.

Have you tried photochromatic lenses? It could be what you’re looking for.

rc__buggy ,

Toothpaste with hydrated silica might polish it off with enough elbow grease. Should be gentle enough to not fuck with the polycarbonate lens itself. I’ve done it with success but the toothpaste I used was an institutional brand and not really fit for putting in one’s mouth.

Commercial toothpaste with hydrated silica would be marketed as “microbeads” or some such.

LouNeko ,

Reading glasses or regular?

Alteon ,

You fix it pretty easily by just getting the lenses entirely replaced. If you have vision insurance, you can do it entirely for free

yokonzo OP ,

Does someone willing to strip off the coating of their glasses sound to you like someone who has vision that allows for more than one pair of glasses a year?

BearOfaTime ,

How often do you replace your glasses? (Just curious, since you mentioned replacing yearly).

My last pair started peeling at 5 years, and I needed a new script by that point anyway.

j4k3 ,
@j4k3@lemmy.world avatar

If it is anything like the polycarbonate lenses on cars, it will take extremely tedious polishing, and then you’ll have continuous issues with yellowing because polycarbonate is not UV stable.

With my auto body shop, I sanded the lenses to 2000 grit and used a polyurethane clearcoat. However, typical automotive clearcoats are not optically perfect. It does not matter with an automotive headlamp, and 99.9% of people will never see the optical properties unless I pointed them out specifically. That said, coatings like automotive clearcoats are designed to adhere to very specific types of substrates. What I was doing was WAY outside of the intended use. I doubt any of the lenses I clearcoated lasted more than 3-5 years as a result.

The PITA part of clearing lenses like I was doing with headlights is that ALL of the old coating must be removed first. If I didn’t sand off every last bit of that coating, it was very noticeable in the final outcome. I had some tricks, but it is not possible to use course grades of sandpaper that would make fast work of it situation but require a primer to level in a typical body shop situation. This meant I had to start with 1k grit. That takes FOREVER to sand through a coating like what headlamps have.

Sanding anything like this is not compatible with optical precision lenses. I have also played with telescopes and building my own eyepieces while also dreaming about grinding my own mirror for a large dob. Optical precision in lenses is OP insane levels. I don’t have the vocabulary to express just how tiny the difference is between good, okay, and absolute trash in optics.

Combining my experiences in these areas, there is absolutely no chance that you’ll be able to polish or abrade then polish an optical lens and yield an acceptable outcome. No matter what you try, the coating will abrade/polish at a different rate than the exposed sections of the underlying polycarbonate lens. This will always result in an uneven surface at optical quality kinds of levels. You would need a sanding block capable of matching the contour of the lens perfectly so as to only abrade away the coating section before contacting the lens.

While clearing headlamps, I had one of two tricks. If all I was doing is shooting the lenses, I would mix my clear without any additional reducer (special solvent) and with a fast catalyst. This required special gun settings and higher pressures to avoid orange peal textures. If I was mixing clear for other panel work, I had to do a few misting passes with clear in between my other panel work. The thin misted coating limits the exposure of the underlying polycarbonate to the solvent present in the clear. If I did a regular wet pass like I would with a panel, the lens would react to the solvent and looked like a shattered windshield.

I don’t know of anyone else that has ever clearcoated headlamps like this. While my work may not have lasted as long as a typical clear, it was a far better solution than polishing, which reoxidizes within a few weeks and worse with the increased exposed surface area after each polishing. For higher end cars, dealers would just pay me to install reproduction headlamps from LKQ, as these will last like the originals or better.

Those are the basics of what I know. I shared as an abstract way to help you understand the scope of what I know, and what you should expect based on this tangentially related expertise. I do not believe you can be successful at removing that coating. In automotive paint, it is not possible to just remove a clearcoat from any surface chemically without impacting the deeper substrate.

BearOfaTime ,

Wow, great info, lots of detail. I’d enjoy watching you work!

SatansMaggotyCumFart ,

If the lenses are plastic acetone will fuck them up.

judooochp ,

Alcohol would, too. Further, avoid mineral spirits and petroleum based solvents entirely.

BearOfaTime ,

Alcohol has never affected my plastic lenses.

There are some plastics it affects, I’ve just never seen it affect glasses. Notably, the eyeglass cleaner kits at eyeglass shops are alcohol based.

JohnnyCanuck ,
@JohnnyCanuck@lemmy.ca avatar

Alcohol will affect acrylic/plexiglass, but its not necessarily a fast reaction. I don’t know what specific plastic glasses lenses are made of. Also, the UV coating might protect them from the alcohol.

fan0m ,

Pulling this straight out of my ass but I think it’s likely to be polycarbonate

Twitches ,

I worked in optical it’s polycarbonate. Can be a plastic called cr39 or it could be a high index lens if they have a very high prescription generally alcohol won’t hurt it. If the frame is plastic the alcohol could potentially fog the plastic.

yokonzo OP ,

Nah they’re glass, besides, I tested acetone on a small spot and it did nothing to remove the coating

Twitches ,

I have worked in optical, that coating is the anti-reflective coating that is coming off. You cannot take that coating off. It is baked on. Harsh chemicals will destroy the plastic lenses. It just degrades and comes off after a while, generally if it is less than 2 years they should be under warranty.

lemming741 ,

…wordpress.com/…/poly-safe-ar-stripper-8oz.pdf

It looks like they all use HF or ABF. Super dangerous if it gets on your skin or in your lungs.

emergency.cdc.gov/agent/…/facts.asp

Some tire and wheel cleaners are HF based, I’d try that.

yokonzo OP ,

Oh well good thing it’s not breaking off into a powdery substance near my nose and mouth

deranger ,

He’s taking about the strippers not the AR coating itself.

Blizzard ,

Half of the picture is blurry, put them back on!

judooochp ,

I recently asked about having my coating re-applied, and the folks at the eye place had a warranty system, where if it came off inside of two years, they’d strip and re-coat the lenses. Might call them to find out if you’re covered, or of they can tell you the stripping method.

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