What binocular vision training actually is
Our two eyes each see a slightly different picture; the brain merges the two into one and reads depth out of the difference. This ability is called binocular vision, usually described as three levels: simultaneous perception, fusion and stereopsis.
In some situations the brain switches one eye's signal off long-term -- suppression, in medical terms -- and the two eyes stop cooperating. Improving that eye's sharpness alone does not teach the pair to work together again.
Binocular vision training presents content to each eye separately: first weakening suppression so the neglected eye rejoins (anti-suppression), then practising merging the two pictures into one (fusion), and finally practising reading depth from their difference (stereopsis).
In recent years researchers have turned this into video games -- dichoptic training: the game's key information is split between the two eyes, the game cannot be played without cooperation, and so the training happens inside the play.
Vision training is about gradual progression and daily consistency -- a short, regular session every day beats an occasional long one.
Vision Training turns split-view practice into nearly 20 home training games, with a training plan and progress curves, running in the browser on computers and tablets.
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This article is educational content, not medical advice; consult an ophthalmologist or optometrist about diagnosis and care. Vision Training is a home vision-training tool, not a medical device.