สายตา 20/20 คืออะไร? - หมอแว่น
สายตา 20/20 คืออะไร? - หมอแว่น
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odoptical.com
Visual Acuity
Visual Acuity
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teachingvisuallyimpaired.com
Legal Blindness Definition in the United States: 1) a visual acuity of 20/200 or less in the better-seeing eye with best correction 2) OR a visual field of 20 degress or less (tunnel vision) in the better seeing eye. --- Blindness is a spectrum! --- #blind #EyeDisease #awareness #spectrum #vision #simulation | Blind on the Move
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Legal Blindness Definition in the United States: 1) a visual acuity o…
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