https://techcrunch.com/2020/01/13/kids-with-lazy-eye-can-be-treated-just-by-letting-them-watch-tv-on-this-special-screen/

Amblyopia, commonly called lazy eye, is a medical condition that adversely affects the eyesight of millions, but if caught early can be cured altogether — unfortunately this usually means months of wearing an eye patch. NovaSight claims successful treatment with nothing more than an hour a day in front of its special display.

The condition amounts to when the two eyes aren’t synced up in their movements. Normally both eyes will focus the detail-oriented fovea part of the retina on whatever object the person is attending to; in those with amblyopia, one eye won’t target the fovea correctly and as a result the eyes don’t converge properly and vision suffers, and if not treated can lead to serious vision loss.