Fast, accurate, hassle-free PD

Hold a card to your forehead and look at the camera. Our on-device AI finds your pupils automatically. A quick one-time card check keeps the measurement accurate, the same way trusted PD tools do it. Nothing ever leaves your browser.

• Good, even lighting on your face
• Press the card flat against your skin, not held out in front of your face, even by an inch
• Sit at arm's length, like a normal video call. Leaning in close actually hurts accuracy
• Look straight at the camera and hold still for a second

This gives an estimate, typically accurate within a few millimeters when the card is aligned carefully. It isn't a substitute for a professional eye exam.

A few quick tips

1. 1Position your face at arm's length away from the camera
2. 2Make sure your full face is in the oval outline
3. 3Grab the center of your card from the top
4. 4Hold the card as straight as possible
5. 5Look at the camera lens, not the screen

Press your card flat against your skin, touching your forehead — not held out in front of your face. Even a small gap there throws off the measurement. Sit at a normal video-call distance, about arm's length from the screen, look straight ahead, then capture.

Drag the green lines so they just touch both sides of your card.

Dots moved. Recalculate to update your result.

Estimate only, based on AI detection and marker placement. Not a substitute for a professional eye exam.