Quick safety check

First, a few things to rule out

Tick anything that sounds like you (or your child). These need a real eye doctor — not a screener.

Sudden new double vision in the last few weeks Vision changes that started after a head injury, concussion, or illness Eye pain, severe headaches, or nausea along with the vision trouble An eye that has suddenly started to turn, drift, or wander Any vision loss, flashes of light, or a curtain/shadow in your sight

This 2-minute screener checks for signs of a convergence problem. It is not a medical diagnosis.

Please get this checked

See an eye doctor first

One or more of the things you ticked can have causes this screener can't detect. Please book an in-person eye exam before relying on any at-home tool.

Sudden double vision, an eye that suddenly turns, pain, or vision loss should always be looked at by a professional.

Already been checked and cleared?

Symptom check

How often does this happen?

Think about reading, homework, or screen time. There are no wrong answers.

0 of 15 answered

Eye test · 2 of 2

Now let's watch your eyes work

Your camera measures how close your eyes can stay teamed up on a target — the same idea as the "pencil push-up" test. Nothing is recorded or uploaded; it runs entirely on your device.

No camera handy?

Your screener result

Result

Here's what we found

CISS symptom score · the mark is the typical symptomatic threshold (16)

Focal VT is an educational tool, not a medical device, and does not diagnose any condition. Results are estimates based on your answers. For any concern about your eyes or your child's vision, see a licensed optometrist or ophthalmologist.