Free tools · in your browser
Eye tools that don't need an optometrist.
Every tool here runs entirely on your device. No account, no upload, no medical visit. Calibrate once with any wallet-size card to your forehead, and every camera-based tool below uses the same calibration.
Pupillary distance (PD)
Try itThe number every online glasses retailer asks for. Measure yours in 30 seconds with your camera and any wallet-size card.
Reading distance monitor
Coming soonLive distance from your screen to your eyes. Healthy is 50–60 cm; most people sit closer than they think.
Daily strain receipt
Coming soonEnd-of-day report: how much time you spent at unhealthy distance, your average reading distance, your trend.
Want the full picture?
The Eyeball Analyzer walks you through why your eyes got worse, what to actually do about it, and your personal numbers — in about 20 minutes.