What's that machine they use at the eye doctor to bend/refit your glasses? (lemmy.world)

submitted 5 months ago by LesserAbe@lemmy.world to c/asklemmy@lemmy.world

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I like getting glasses off of Zenni but they never seem to fit quite right, mostly the arms. Would be nice to be able to make adjustments.

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[-] BertramDitore@lemmy.world 16 points 5 months ago

The closest I’ve been able to get to it is to submerge the arms in hot (nearly boiling) water for a bit, and then make the adjustment. It’s not quite as effective, but depending on what the frames are made out of it can do the job in a pinch.

[-] someguy3@lemmy.ca 7 points 5 months ago* (last edited 5 months ago)

Hm at what temperature do the lenses melt?

[-] j4k3@lemmy.world 7 points 5 months ago

https://www.wikipedia.org/wiki/Polycarbonate

Probably ~130C but I would not gamble on this. I have no experience in lenses like this or their specific plastic composition. I just know most are based on polycarbonate, have made my own corrective reading, and my own anaglyph, glasses.

[-] nonfuinoncuro@lemm.ee 6 points 5 months ago

my lenses didn't melt but I have definitely fucked up the coating by walking into a sauna for just a minute which is very far below 100c

this post was submitted on 02 Apr 2024

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