GrahamPA, WallaceJ, WelsbyE, GraceHJ. Evaluation of postal detection of registrable blindness. Br J Preu Soc Med1968; 22: 238–41
2.
BrennanME, KnoxEG. An investigation into the purposes, accuracy and effective uses of the blind register in England. Br J Prev Soc Med1973; 27: 154–9
3.
CullinanTR. The epidemiology of visual disability. Health Services Research Unit Report No. 28 1977
4.
WeddellJM. Registers and registries: A review. Int J Epidemiol1973; 2: 221–8
5.
GibsonJM, LaveryJR, RosenthalAR. A study of the prevalence of eye disease in the elderly in an English community. Trans Ophthalmol Soc UK1984; 104: 196–203
6.
ThompsonJR, GibsonJM, JaggerC.The association between visual impairment and mortality in the elderly. Age Ageing1988
