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blind

Defined in 3 places across 2 titles of the United States Code.

The term “blind” refers to an individual or class of individuals whose central visual acuity does not exceed 20/200 in the better eye with correcting lenses or whose visual acuity, if better than 20/200, is accompanied by a limit to the field of vision in the better eye to such a degree that its widest diameter subtends an angle of no greater than 20 degrees.

Same definition in 2 sections

"blind" means an individual who has central visual acuity of 20/200 or less in the better eye with the use of a correcting lens or whose eye is accompanied by a limitation in the fields of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees;

Source

Blind.—The term “blind” refers to an individual or class of individuals whose central visual acuity does not exceed 20/200 in the better eye with correcting lenses or whose visual acuity, if better than 20/200, is accompanied by a limit to the field of vision in the better eye to such a degree that its widest diameter subtends an angle of no greater than 20 degrees.

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