Accessibility Testing

Testing that determines if software will be usable by people with disabilities.

It is also called as ADA testing or 508 complaiance testing.(American disabilities act). Testing the application with respect to physically challenged persons point of view is called accessibility tesing..

Such as blindness, low or restricted vision, or color blindness. User with visual impairments uses assistive technology software that reads content loud. User with weak vision can also make text larger with browser setting or magnificent setting of operating system.

To know more plz visit Accessibility more

OR

To know more plz visit Testing for Accessibility MSDN