Settings

▲▼ select · ◀▶ change · Enter / Esc close

Before you start

This app is a supplement to vision therapy prescribed by an optometrist or ophthalmologist. It is not a medical device and does not diagnose or treat any condition.

Turn off any screen colour filters (night mode, blue-light filters), then wear your red-green or red-blue glasses and choose the matching type in Settings.

Press Enter or tap to continue