Auto Chart Projector is a precision optical instrument for accurate refraction. It provides 30 different charts and 35 masks, with programmable remote control. Duochrome test charts to check single and binocular vision, and polarized test charts to check binocular vision and ocular muscle imbalance.

See the features : https://drive.google.com/file/d/11UBrFpQ0MiaGP0KMAWTxuEVNO1s-vywl/view