This manual is intended to provide information leading to reliable assessment of vision and hearing capabilities of children considered to have dual sensory impairments. Ongoing sensory assessment is necessary to determine the extent of residual sensory abilities that should be considered in educational programming decisions and to determine any changes in those abilities. The visual assessment involves review of relevant medical reports and previous assessment results, and assessment in the areas of reflexive visual processes, field of vision, ocular motility, and visual acuity. Auditory assessment may involve such alternative procedures as tangible reinforcement operant conditioning audiometry and visual reinforcement audiometry. The importance of naturalistic observations is emphasized. A list of 8 references and 11 recommended readings is included. (JDD)