Prescription Analysis第 34 / 100 题
A patient has Rx OD -1.00 DS. What does 'DS' indicate?
a.Double segment
b.Distance seg
c.Decentration standard
d.Diopters sphere with no cylinder
解析
DS stands for diopters sphere, meaning the lens is spherical only with no cylinder or axis. The prescription is simply -1.00 D of sphere.
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