相关考题
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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
