U.S. National Library of Medicine
Visual impairments limiting one or more of the basic functions of the eye: visual acuity, dark adaptation, color vision, or peripheral vision. These may result from EYE DISEASES; OPTIC NERVE DISEASES; VISUAL PATHWAY diseases; OCCIPITAL LOBE diseases; OCULAR MOTILITY DISORDERS; and other conditions. Visual disability refers to inability of the individual to perform specific visual tasks, such as reading, writing, orientation, or traveling unaided. (From Newell, Ophthalmology: Principles and Concepts, 7th ed, p132)
The numerical value of vision disorders in Chaldean Numerology is: 9
The numerical value of vision disorders in Pythagorean Numerology is: 1
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"vision disorders." Definitions.net. STANDS4 LLC, 2017. Web. 23 Aug. 2017. <http://www.definitions.net/definition/vision disorders>.