1. Refractive error distribution in a profoundly retarded population;Amos;Am J Optom Physiol Opt,1977
2. Eye defects of mentally handicapped children;Bankes;Br Med J,1974
3. Ophthalmic survey of 162 mentally retarded children;Byron;NY J Med,1962
4. Ocular findings in developmentally handicapped children;Edwards;J Pediatr Ophthalmol Strabismus,1972
5. Eye abnormalities in the mentally defected;Fletcher;Am J Ment Defic,1961