Blind-spot visualization tool

This tool will attempt to build a map of your visual field, highlighting your blind spot.

Disclaimer

This web-page is created purely for fun and is not intended to diagnose any medical condition. Please do not use this if you suffer from any condition that may be aggravated by straining your eyesight or staring at a screen for prolonged time. Use this at your own risk. Please refer to the full disclaimer before proceeding.

Instructions

The tool works best on a laptop or desktop computer, not on a mobile device. First, select a test size (number of points) below. This window will disappear and a "+" sign will show up in the middle of the screen.

Close one eye. Position your head so the open eye is centered in front of the "+" sign at distance approximately one display width. Make sure you are comfortable and can keep your head at this position without moving.

Looking directly at the "+" sign and keeping the other eye closed, press any key on your keyboard. A sequence of blinking dots will appear in your field of vision. When you see a the blinking dot, press any key. If you do not see the dot, do not press anything. Keep looking directly at the "+" sign at all times.

After the test is complete a map highlighting your blind spot will appear.

Select test size to proceed: 75 150 300