Glasses correct your vision. Websites don't know that. 4Eyes is a Chrome extension that adapts every website to your eye prescription in real time. Enter your SPH, CYL, Axis, and ADD values and it automatically adjusts brightness, contrast, letter spacing, line height, and font weight across every site you visit. It also recommends the best fonts for your prescription — Atkinson Hyperlegible, Lexend, Nunito, or Source Serif 4. Free. Works everywhere.