Visual Encyclopedia

Visual impairment

Visual impairment, also known as vision impairment or vision loss, is a decreased ability to see to a degree that causes problems not fixable by usual means, such as glasses. Visual impairment is often defined as a best corrected visual acuity of worse than either 20/40 or 20/60. Visual impairment may cause people difficulties with normal daily activities such as driving, reading, socializing, and walking.

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