It is difficult to understand why the fundus examination in idiocy has been so little emphasized. Probably the examination of the fundus in such cases, being so extremely difficult, may account in part for the lack. Possibly the negative findings of Moss1 have also deterred some from the study. He examined 116 feeble-minded children in Berlin. The study showed but 2 cases with alteration in the fundus. His cases, however, were not drawn from the low-grade idiots.
The much more careful work of Gelfe2 on 578 cases throws more light on our subject. His cases comprised (1) 192 mentally backward boys and 192 girls of the same class; (2) 25 boys and 21 girls who were weak-minded (feeble-minded of our designation) and 47 boys and 30 girls who were unteachable imbeciles (imbeciles of our classification), and, finally, 42 boys and 28 girls of the low-grade idiots. All the
CLARK LP, COHEN M. A STUDY OF THE EYE IN MENTAL DEFECTIVES. JAMA. 1910;LIV(16):1287–1288. doi:10.1001/jama.1910.92550420001001d
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