Indeed. A long time ago I worked as an internship in one of those places, and cutting the glasses requires special equippment to follow the sample shape and get rid of all the fine dust that is produced while grinding them down. But the work done is usually quite cheap compared to the cost of the glasses themselves, so that is definitly not something I would DIY.
Comment on Replacement prescription eyeglass lenses?
AscendantSquid@lemmy.world 1 day ago
Have you asked a brick-and-mortar eyeglass shop how much they’d do it for? Independently run places tend to be a lot more accommodating in my experience, and asking’s free. Considering how much of a PITA cutting and drilling your own lenses sounds like it would be (not to mention the possibility of breaking them in the process and having to get new ones), it’s worth asking a couple of different shops first.
poVoq@slrpnk.net 1 day ago grue@lemmy.world 1 day ago
How does the process change when they’re rimless glasses (so the only things I need to be concerned about are getting the pupillary distance and axis right, and then drilling a few holes in the correct spots – the edge is just flat-ground instead of a V-bevel and can be whatever arbitrary shape I want)? Surely that reduces the need for a fancy shape-copying machine, right?
- poVoq@slrpnk.net 1 day ago
For rimmless glasses they have positive shapes supplied by the frame manufacturer that the machine can follow. But usually the shape isn’t that important for rimmless glasses so they can likely find a form in their stock that is similar enough to your current glasses shape.
grue@lemmy.world 1 day ago
I haven’t asked a brick-and-mortar shop yet because I had found out that I couldn’t just buy identical new ones minutes before writing the post. I’ll try that, although I’ll have to do some searching to find an optician around here that isn’t a chain.