Blindness is the condition of lacking visual perception due to physiological or neurological factors. Various scales have been developed to describe the extent of vision loss and define “blindness.”[1] Total blindness is the complete lack of form and visual light perception and is clinically recorded as “NLP,” an abbreviation for “no light perception.”[1] Blindness is frequently used to describe severe visual impairment with residual vision. Those described as having only “light perception” have no more sight than the ability to tell light from dark. A person with only “light projection” can tell the general direction of a light source. In order to determine which people may need special assistance because of their visual disabilities, various governmental jurisdictions have formulated more complex definitions referred to as legal blindness.[2] In North America and most of Europe, legal blindness is defined as visual acuity (vision) of 20/200 (6/60) or less in the better eye with best correction possible. This means that a legally blind individual would have to stand 20 feet (6.1 m) from an object to see it—with vision correction—with the same degree of read more [...]