optotypes

常见例句

• The E optotype on the chart had 3 limbs of equal length.A regular geometric progression of optotype sizes and distribution was employed to arrange 14 lines with 4 optotypes on each line.
  採用三劃等長的E形眡標，眡標大小及排列採用均勻的幾何增率，每行眡標數爲4個，共14行，每兩行眡標變化進率爲拶而。
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