眼注视远物时，物体成像在视网膜之后，这种屈光不正称为：

A．Lower than in the open ocean
B．Higher than in the open ocean
C．No generalizations can be made: the amount of nutrients depends on having or not having kelp
D．No generalizations can be made: the amount of nutrients depends on the type of substrate

A.取决于睫状肌的收缩力
B.取决于晶状体的弹性
C.与近点成反比
D.随年龄增长而减弱
E.与视网膜的感光能力无关