Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery. Visual Impairments can mean a number of things. If you are visually impaired it doesn't necessarily mean you are blind, it could mean you are blind or have impaired vision. A person who is totally blind can not see light or anything else. Some people use different things to help with their visual impairments by using adaptions such as glasses, Braille, seeing eye dogs, canes, and adaptive computer technology.