Why is your prescription engraved into the lenses of your glasses when it disrupts having a clear view vision? - Quora
![Any idea what these weird numbers and letters on prescription sunglasses lenses. Just bought these prescription sunglasses and they have these 2 alphanumeric on each of the lenses (circled). Are these normal, Any idea what these weird numbers and letters on prescription sunglasses lenses. Just bought these prescription sunglasses and they have these 2 alphanumeric on each of the lenses (circled). Are these normal,](https://i.redd.it/axfs9he3p2c51.jpg)
Any idea what these weird numbers and letters on prescription sunglasses lenses. Just bought these prescription sunglasses and they have these 2 alphanumeric on each of the lenses (circled). Are these normal,
![Laser etched “T” on transition glasses. Is this new procedure to put an etched letter on the line of sight? There are 2 Ts on each lens. One T on the left Laser etched “T” on transition glasses. Is this new procedure to put an etched letter on the line of sight? There are 2 Ts on each lens. One T on the left](https://i.redd.it/0e3ezohqdo921.jpg)
Laser etched “T” on transition glasses. Is this new procedure to put an etched letter on the line of sight? There are 2 Ts on each lens. One T on the left
![Is the tiny circle which is laser etch in my eyeglass lens (1.67 index) a symbol of the lens maker? - Quora Is the tiny circle which is laser etch in my eyeglass lens (1.67 index) a symbol of the lens maker? - Quora](https://qph.cf2.quoracdn.net/main-qimg-8ae23fe7592534b9657f059a7204cab8.webp)