Diabetes and Cataract-Mc(uinness MEDBALJOURNAT seemed to show a greater response to glucose challenge than the other female groups. The numbers in the present group are too small for the significance of this observation to be assessed, and further study is required. It is possible that the diabetic with lens opacities may progress to a stage requiring cataract extraction more rapidly than a non-diabetic. This might explain the discrepancy between the lack of correlation in this survey and the reports of increased prevalence of diabetes in patients admitted for cataract extraction. SummaryThe prevalence of diabetes in a sample of 340 persons of the general population of the Rhondda Fach was not found to differ in persons with and without lens opacities.Persons with and without lens opacities show no significant difference in blood-sugar response to glucose challenge. Females with lens opacities show a greater response to glucose challenge than males with lens' opacities.It would appear that diabetes is not such an important cause of lens opacity formation in the general population as was previously thought, but persons with a diabetic tendency may develop lens opacities progressing to a stage requiring cataract extraction more rapidly than non-diabatics. Further studies to investigate this point are in view.

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