This does not imply that other communities are, in some way, affected less or not affected at all. Remember that the goal is to achieve accessibility to the greatest extent possible for all people with disabilities. By building awareness around the current issues and the most visible areas of inaccessibility, this book helps identify new areas that can be resolved in the near future. Of all the disability communities concerned by the inaccessibility of the Web, people with visual disabilities probably rank first. This is primarily due to the graphical nature of the Web's client-server interface.
Visual disabilities vary in category including low vision, color blindness, and total blindness.
The following sections contain a description of each. If ordinary eyeglasses, contact lenses or intraocular lens implants don't give you clear vision, you are said to have low vision. Don't confuse this condition with blindness. People with low vision still have useful vision that can often be improved with visual devices. Whether your visual impairment is mild or severe, low vision generally means that your vision does not meet your needs.