4eyes

4Eyes — Vision Adaptive Display Pro
See the web the way your eyes were meant to.
4Eyes is the first Chrome extension that adapts every website to your personal eye prescription in real time. Simply enter your prescription values (SPH, CYL, Axis, ADD) and 4Eyes automatically optimizes your entire browsing experience for your specific vision needs.
How it works
Most people with prescriptions wear glasses or contacts to correct their vision — but even with correction, screen reading can cause eye strain, headaches, and fatigue. 4Eyes goes further by adapting the display itself to reduce strain at the source.
What 4Eyes adjusts

Brightness — reduced for myopia to minimize glare, optimized for hyperopia
Contrast — scaled with astigmatism severity for sharper, clearer text edges
Letter spacing — adjusted based on your axis direction for easier character recognition
Line height — increased for horizontal astigmatism to improve line tracking
Font recommendations — 3 fonts ranked and recommended based on your prescription type

Recommended fonts for your eyes
4Eyes analyzes your prescription and recommends the best fonts for your vision condition — from Atkinson Hyperlegible for low vision to Lexend for astigmatism, Nunito for hyperopia, and Source Serif 4 for presbyopia.
Your data, your privacy
Your prescription is stored securely in your personal account and never shared. All display adjustments happen locally in your browser.
Who is 4Eyes for?

People with myopia (nearsightedness)
People with hyperopia (farsightedness)
People with astigmatism
People with presbyopia (reading glasses)
Anyone who experiences eye strain from screen use

Getting started

Install 4Eyes
Click the extension icon and open the dashboard
Create your free account
Enter your eye prescription
Browse comfortably — 4Eyes handles the rest

Your eyes work hard every day. 4Eyes works with them.