Web accessibility refers to the practice of making websites usable by people of all abilities and disabilities. When sites are correctly designed, developed and edited, all users can have equal access to information and functionality.
The needs that Web accessibility aims to address include:
Visual impairments including blindness, various common types of low vision and poor eyesight, various types of color blindness;
Motor/Mobility:Motor difficulty or inability to use the hands, including tremors, muscle slowness, loss of fine muscle control, etc., due to conditions such as Parkinson's Disease, muscular dystrophy, cerebral palsy, stroke;
Deafness or hearing impairments, including individuals who are hard of hearing;