1Further reading: Thomson, GOB et al (1985) Meeting the special educational needs of the visually impaired: The process of decision making. Edinburgh: University of Edinburgh.

2Buultjens M & Aitken S (1987) Assessment of vision in multiply impaired children - a consideration of evidence. British Journal of Special Education 14:1120114

3Aitken S & Buultjens M (1991) Visual assessments of children with multiple impairment: a survey of ophthalmologists. In Journal of Visual Impairment and Blindness 85(4):170-173