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Blindness
Vision impairment and blindness are conditions in which a person cannot see well or see at all, even with glasses or contact lenses. If a person's best vision (with correction) out of either eye is only 20/70 - 20/200, he is impaired. If he can see no better than 20/200 or his visual field is no more than 20 degrees (severe "tunnel" vision), he is legally blind.
Dr. Geoffrey Rutledgereviewed this
Internal Medicine 39 years experience
How long it usually lasts:
Chronic (lasts years to lifelong)
How common is it?
Common
Body locations