题目内容
(请给出正确答案)
[单选题]
硬性前环曲面接触镜的柱镜焦度为3.00的,中心厚度约为( )
A.0.20mm
B.0.24mm
C.0.26mm
D.0.28mm
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A.0.20mm
B.0.24mm
C.0.26mm
D.0.28mm
A.0.87D
B.1.25D
C.1.62D
D.2.25D
A.-5.75-3.00×180
B.-5.75-2.25×180
C.-5.75-3.75×180
D.-5.75-3.25×180