an uncorrected visual acuity of at least 20/40 (6/12) with both eyes open. 4 l/ ^2 n: G0 J; K ~( t
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visual aids (glasses or contact lenses) must have vision of 20:20 (6:6) with both eyes open. + ~. K3 x' H+ P3 @2 ~0 c" H' }0 M) f% F
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。 " g+ }0 w4 b! _4 U2 ^: s6 Kan 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)。 8 \: r/ I+ k- b% j2 @; Tvisual 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 # M+ ~8 m4 E: j9 G0 p! f E4 x4 m( a1 i" w/ c7 u4 G
你的视力is 20/200 (20 means from 20 ft.) 如果能看清最下行最小的 % _$ A, N$ d$ o7 g3 Z, R# |' _6 r" f2 ?/ w2 _, C q5 x- e
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