单项选择题

Stickler综合征可引起的眼部异常不包括（）

A.高度远视
B.视网膜裂孔
C.青光眼
D.视网膜血管周围色素沉着

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单项选择题

引起的晶体半脱位不包括（）

A.马凡综合征
B.高胱氨酸尿症
C.Weill-Marchesani综合征
D.Hallermann-Streiff-Francois综合征

单项选择题

The following transpositions are correct：（）

A.PL/-2.00X180=-2.00/+2.00X90
B.+2.00/-0.50X60=+2.50/+0.50X150
C.-1.25/+0.75X4=-0.50/-0.75X86
D.+7.00/-2.00X78=+5.00/+2.00X12
E.+0.25/-3.00X50=-3.25/+3.00X140

单项选择题

which of the following is correct about Jackson cross-cylinder：（）

A.a -0.50D sphere is coupled with a -1.00D cylinder
B.is useful in refining the spherical power during trial of lens
C.the handle is mounted parallel to one of the axis of the cylinders
D.when refining the power of a trial cylinder，the handle of the Jackson cross-cylinder is placed in line with the axis of the trial cylinder
E.a Jackson cross-cylinder designated 1.00D consists of a +1.00D cylinder