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枫下家园 / 医药保健 / 请问这里的视力20/40双眼相当于国内说的几点几?
-mfcguy(daniel);
2006-9-21
(#3219571@0)
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20/40=0.5 means the shortsight person can see at 20 feet clearly what a normal person can see at 40 feet
-jin_ting(jy);
2006-9-21
(#3219903@0)
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那20/20就是1.0? 20/15就是1.5? 20/10就是2.0? thanks anyway.
-mfcguy(daniel);
2006-9-22
(#3221166@0)
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老大,应该是分母不变吧,
-canadalabour(燒味);
2006-9-22
(#3221174@0)
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check it out
-mfcguy(daniel);
2006-9-22
(#3221177@0)
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I got it,thanks a lot.
-canadalabour(燒味);
2006-9-23
(#3225289@0)