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Definition
blindness - being without sight; or, having a maximal visual acuity after correction
by refractive lenses, of one-tenth normal vision or less (20/200 or
less on the
Snellen test).
Links
blindness - Foundation Fighting
Blindness
blindness - Prevent Blindness
America
blindness - World Health Organization (WHO)
blindness - National
Eye Institute
blindness - MedlinePlus
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