Fuchs角膜内皮营养不良早期视力障碍的主要特点是（）

A.溶解粘液
B.润滑作用
C.抗炎作用
D.免疫抑制作用

A.is a feature of wound healing
B.contains fibroblasts
C.contains thin-walled capillaries
D.often contains granuloma

A.is useful in myopic patients to avoid undercorrection
B.cannot be used in colour blind patients
C.is due to spherical aberration of the eye
D.red light is refracted less than green light
E.at completion of duochrome test，green letters should be clearer than red letters