Vision tests
A small set of free tools that run entirely in your browser — nothing is uploaded, nothing is stored. Each one is a screening aid, not a medical diagnosis.
Pupillary distance (PD)
Measure the distance between your pupils with your camera — the number you need to order glasses online.
Measure your PDAstigmatism test
A quick screening with the classic fan chart. See whether some directions look sharper than others.
Take the testColor blindness test
Ishihara-style plates that screen for red-green color vision deficiency, the most common type.
Take the test
These are educational screening tools, not a substitute for a professional eye exam. If anything concerns you, see an optometrist or ophthalmologist.