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What is Cortical Visual Impairment CVI

Cortical Visual Impairment (CVI) also known as Cerebral Visual Impairment is a neurological form of visual impairment caused by “damage or atypical structures in the...

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Origins of the Runge Near-Vision Test Card

The Runge Near-Vision Test Card, developed by Dr. Paul Runge during his ophthalmology residency at Cook County Hospital, Chicago, addresses the need for a rapid...

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Low Vision Tests and Products

Low vision is defined as vision loss that causes everyday activities to be difficult and for which vision cannot be corrected with medication, surgery, glasses...

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