视力正常的

An infant with normal vision will fixate on a light held before him.

一个有正常力的婴儿会注他面前的光亮。

Not only eye's health, and is restricted in the normal vision and the color discrimination and the scotopia, moreover also includes often the stereo perception which is neglected by the human.

眼睛的健康，并不仅限于正常的力与辨色力及暗力，而且还包括常被人忽的立体感觉。