Pick a topic. Click the lever. Discover what helps.
With comparison on, the original stays on the left and your selected experiment appears on the right.
A change to the design—not a cure or a recreation of someone’s sight.
This is a visual experiment, not a vision test. The original photo stays the same while a mathematical model changes its colors.
The red–green views simulate deuteranopia and protanopia. Blue–yellow is a tritan-type approximation, not an exact depiction of tritanopia. People with the same diagnosis can have different experiences.
Your photo stays on your device. Try a JPG, PNG, WebP, or AVIF under 25 MB. Example photos and viewer art are AI-generated.
Use the handle with a mouse, touch, Enter, or Space. Compare keeps the left lens original. Facts stay until you change them; nothing disappears while you’re reading.
The three clarity views use softening, stronger softening, and softening with reduced contrast. They are not clinical severity levels. The clarity, contrast, glare, and field-of-view effects are teaching illustrations, not validated disease simulations. The field views hide detail in fixed image regions; they do not follow your gaze or show the brain’s adaptations. A veil marks reduced information, not what a person necessarily sees.
Annalisa D’Innella describes using a cane while retaining useful sight. Read her first-person account.
RNIB’s VI Lives draws on hundreds of conversations about life with vision impairment.
National Eye Institute: low vision and practical adaptations
National Eye Institute: color vision deficiencyNational Eye Institute: different types
Simulation: Machado, Oliveira, and Fernandes (2009), maximum preset strength in linear RGB. Tritan-model limitations.
