Sectional classification of cataract.
It is of importance to epidemiologically explore the risk factors which will induce cataract. Both the sections of lenses and their grades of opacity were classified only on the basis of the findings by the slitlamp microscope in order to examine the cases with cataract. There are split ways for classification of the cases with cataract, but it would be of no meaning if the classification for this purpose is not generally utilized, no matter how detailed it may be. Therefore, a simplified method for classification was discussed in the present study. There were variations in the grades of opacity with the sections of the lens, and the variations give different effects upon the visual disturbances. Especially, it was conceived that the visual power would be affected by the opacity of the posterior cortex. Also, it was conceived that the opacity of the posterior cortex tends to advance faster.
Obara
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Y
Department of Ophthalmology, Koshigaya Hospital, Dokkyo Medical University, Saitama, Japan.
D002386:Cataract / Q000145:classification* / Q000453:epidemiology; D002387:Cataract Extraction; D006801:Humans; D013997:Time Factors