One world.
Many ways
to see it.
A gentle, interactive look at colour vision and focus. Try a short colour exercise, compare a live scene, and explore everyday vision examples.
Educational only · No diagnosis · Camera stays on your device
ONE SIZE FITS ALL ↗
01 / COLOUR CHECK
How do colours
read to you?
Find the tile that looks different. Eight quick rounds explore red–green and blue–yellow colour discrimination on this screen.
A little test of perception.
Set your screen to a comfortable brightness. Turn off colour filters or Night Shift if you can. Choose the tile that looks different, or “I’m not sure.”
Eye doctors use standardized colour plate and other tests to confirm colour vision differences. How clinical colour testing works ↗
02 / LIVE COMPARISON
Same scene.
Another lens.
Place two views side by side. Use your rear camera or explore the sample scene. Everything is processed locally on your device.
These simulations approximate colour differences; they cannot show exactly what another person sees. Camera access works on HTTPS or localhost. No frames are saved or sent anywhere.
03 / FOCUS GALLERY
Focus can change
the whole picture.
Choose a common refractive condition, then switch between near and far details in an illustrated scene. These are teaching examples, not a way to test your eyes.
ILLUSTRATIVE VIEW
Myopia
Distant things can appear blurry, while nearby details may remain clear.
Real experiences vary and conditions can occur together. An eye exam is the way to understand your own vision. Learn about refractive errors ↗
A NOTE TO TAKE WITH YOU
Curiosity is a
good place to start.
These tools can spark questions, but only an eye care professional can assess your vision. If you notice a change or have concerns, book an eye exam.
Why eye exams matter