an uncorrected visual acuity of at least 20/40 (6/12) with both eyes open. 5 a9 V( r. u& O1 F- {! s8 L
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visual aids (glasses or contact lenses) must have vision of 20:20 (6:6) with both eyes open. 0 M( F# j% l: L" G3 Z6 ]* v
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重要的是专业问题:20/40是什么意思?校正后双眼视力20/20(6:6)是什么意思?
我试试啊,不好或不对请谅解,因为我不是近视,没有看过眼医。6 {* k1 M* B8 p! q7 F
an uncorrected visual acuity of at least 20/40 (6/12) with both eyes open. 两眼睁开时,未矫正的双眼视敏度至少是20/40(6/12)。3 h& Z: Q+ O+ I2 @4 [' y; U% N
visual aids (glasses or contact lenses) must have vision of 20:20 (6:6) with both eyes open.在有视力辅助(如眼镜或隐形眼镜)的情况下,双眼睁开时,视敏度可为20:20(6:6),相应增强。
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我过去常检查眼睛。从20 ft (6 米) 远,如果只能看清top最大的0 ?; w k& E" C, c# k d1 J
E 5 {7 Z0 [6 E9 ^- t' ]5 O 你的视力is 20/200 (20 means from 20 ft.) 如果能看清最下行最小的3 Y t3 S! W4 y2 @
" |. z* i7 x" M7 g4 r8 m E V O T Z 0 v5 V; @9 u( z1 I2 I, T - b4 P* ?, u5 P( x$ y O$ U你的视力is 20/20. 也就是1.5。拿到 Diver’s license 的视力要求是 20/40, 也就是校正后的视力能看清from bottom up 第3行,也就是校正视力1.0.