Technology has been used to measure visual acuity with the severely or profoundly mentally retarded child. The following categories of technology have been used for assessment: the recording of visual fixation within the habituation paradigm; equipment to measure eye movements and pursuits; operant techniques; and electrodiagnostic techniques…

This study found that, of 18 children with severe visual and multiple impairments assessed using the Acuity Card Procedure (originally developed for assessing the visual acuity of infants), 42 percent responded. A similar group received a simple instructional intervention prior to testing and that group's response rate was 85 percent. (Author/DB)

This article describes addition of a "learn a routine" procedure to functional visual assessments of children with severe neurological and physical disabilities. The procedure capitalizes on the child's interest of the moment and provides information on the child's patterns of responses, ability to accommodate to variations of a stimulus, and…