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Evenhuis HM, Sjoukes L, Koot HM, Kooijman AC. Does visual impairment lead to additional disability in adults with intellectual disabilities? J Intellect Disabil Res. 2009 Jan;53(1):19-28.

Evenhuis HM, Sjoukes L, Koot HM, Kooijman AC. Does visual impairment lead to additional disability in adults with intellectual disabilities? J Intellect Disabil Res. 2009 Jan;53(1):19-28.

Impaired vision, blindness

What are impaired vision and blindness? The WHO definition of impaired vision is that visual acuity (after correction!) is less than 0.3 but more than 0.05 or that the field of vision is less than 30...
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