【判断题】The total astigmatism equals the corneal astigmatism plus the crystalline lens a stigmatism.
【单选题】2 5 . 移液管上标注 “20 °C , 25ml , Ex , A” 的意义是 ( ) 。
A.
标准温度 20 ℃ ,标称容量 25ml ,量出式, A 级
B.
标准温度 20 ℃ ,标称容量 25ml ,量入式, A 级
C.
标准温度 20 ℃ ,定容至刻度,管内的液体体积为 25ml
D.
任何温度时,定容至刻度,管内液体体积为 250ml
【简答题】with rule astigmatism
【单选题】According to the description of a patient: +2.75/-2.00×90,, what kind of astigmatism is it?
B.
against-rule astigmatism
【简答题】against rule astigmatism
【判断题】Astigmatism occurs when the curvature of one side of the cornea is steeper or rounder than the other side.