Vision Adaptive Display Technology

Your screen,
calibrated
for your eyes.

4Eyes reads your eye prescription and instantly adapts brightness, contrast, text scale, and spacing across every app and website — so every screen feels like it was designed just for you.

⬇ Download Free See how it works
3
Platforms Supported
6
Prescription Fields
<1s
Real-Time Response
∞
Websites Adapted
How it works

Three steps to
perfect vision comfort.

No configuration required. No eye tests needed. Just your prescription and 4Eyes does the rest.

01
Enter your prescription
Type in your SPH, CYL, Axis, and ADD values for each eye. 4Eyes detects your astigmatism type and calibrates instantly as you type.
02
Watch your display adapt
Brightness, contrast, text scale, letter spacing, and line height all adjust automatically in real time — no button press needed.
03
Browse comfortably
The Chrome extension applies your settings to every website you visit. 4Eyes runs silently in your menu bar, always protecting your eyes.
04
Fine-tune anytime
Manual override sliders let you adjust settings beyond your prescription whenever you want. You're always in control.
Right SPH
-2.25
Left SPH
-1.75
Right CYL
-0.50
Axis
090°
Features

Built for real eyes.
Not just dark mode.

Every feature in 4Eyes is designed around actual vision science, not just aesthetic preference.

👁
Prescription-Based Calibration
Enter your full eye prescription including SPH, CYL, Axis, and ADD. 4Eyes calculates the optimal display settings for your unique vision profile.
⚡
Real-Time Adjustment
Display settings update as you type your prescription — no buttons, no waiting. See the difference instantly on every element of your screen.
🌐
Chrome Extension
The 4Eyes Chrome extension applies your prescription settings to every website you visit — text scale, contrast, spacing, and line height across the entire web.
🖥
Multi-Monitor Support
Control brightness across all connected monitors simultaneously or fine-tune each display individually for the perfect setup.
🔬
Astigmatism Intelligence
4Eyes detects your astigmatism type from your axis value — horizontal, vertical, or oblique — and applies the precise adjustments that make text sharper for your eyes.
🔇
Runs Silently in Background
4Eyes lives in your menu bar as a small icon. No dock clutter, no open windows. Just quiet, constant protection for your eyes all day long.
Get 4Eyes Free

Start seeing better today.

Download 4Eyes for your platform and install the Chrome extension.
Setup takes less than 2 minutes.

🍎 Download for Mac 🪟 Download for Windows 🐧 Download for Linux
✓ macOS 12+ ✓ Windows 10/11 ✓ Ubuntu / Debian

Also install the Chrome Extension → to apply your settings to every website.