Ishihara Color Blind Test

Ishihara Color Blind Test is a free app designed for initial color vision screening and awareness. It provides multiple collections of Ishihara plates for both exploration and self-testing.

FEATURES
* 38/24/14 high-quality plates (SVG+) created by Martin Krzywinski / Canada's Michael Smith Genome Sciences Centre
* Additional test contents with plates generated using Ishihara Plate Generator: https://franciscouzo.github.io/ishihara/
* Test mode with result summary and general indication of possible color vision deficiency
* Simple and intuitive navigation (touch or physical keyboard)
* Optionally override the default settings of each test content to always randomize plates, randomize buttons and use all plates.
* The plate size automatically scales to match the screen width by default, with an option to use an adjustable fixed size if preferred.

KEYBOARD SUPPORT
* [Home] : First Plate
* [←] : Previous
* [→] : Next
* [End] : Last
* [K] : Start Test
* [S] : Stop and Summarize Results
* [Num] keys : Select the right answer using a num key according to the num badge of the answer buttons

IMPORTANT NOTICE
This app is intended for preliminary screening and educational purposes only. Ishihara plates displayed on digital screens cannot replace professionally administered colour vision testing. Variations in LCD/LED displays, brightness, colour calibration, and ambient lighting can affect colour perception and may lead to inaccurate or inconsistent results.

By using this app, you acknowledge its limitations and understand that results are indicative only. This app is designed to raise awareness and support early self-screening, not to provide medical advice, diagnosis, or certification.

If you have difficulty identifying numbers or receive unclear results, do not rely on this app for diagnosis. Please consult an optometrist or ophthalmologist for a proper clinical assessment, especially if colour vision is important for work, study, or daily activities.

PRIVACY
This app does not collect, store, or transmit any personal data.