Which is not ture about Granulation tissue：（）

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

A.aepitheloid cells
B.round cell infiltrate
C.Langhan’sgiant cells
D.Schauman’s bodies

A.糖尿病性视网膜病变
B.视网膜分支静脉阻塞
C.视网膜中央静脉阻塞
D.放射性视网膜病变
E.血液相关性视网膜病变