Providing extensible document access to assistive technology providers

A system and computer program product provides an intermediary access engine between a specific document and a renderer for assisting individuals with vision impairment. The access engine is instantly activated responsive to the initiation of an event within an application. In response to instantiation of the access engine, the renderer queries the access engine to determine supported navigation modes for serving the document to the individual. The access engine receives navigation and commands from the renderer and sends rendering information for the current focus within the document to the renderer. The renderer uses the received information to render an output via one or more enhanced capabilities of the renderer. The rendered output may then be utilized by individuals with vision impairment. The output, for example, may be a speech output, brail output, or font enlargement output for application data.