What diseases cause blindness?

 

A visual impairment is any visual condition that impacts an individual’s ability to successfully complete the activities of everyday life. Students with visual impairments are infants, toddlers, children and youths who experience impairments of the visual system that impact their ability to learn. There are three classification systems for individuals with visual impairment that are used by education professionals. To be declared legally blind, an individual must have visual acuity of 20/200 or less, or have a field of vision restricted to 20 degrees or less at the widest point. However, this federal classification system is used primarily to determine eligibility for adult agency services.

https://www.eturbonews.com/1601163/zenith-labs-vision-20-review-user-exposed-truth-must-read/

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