What Is Amblyopia Exanopsia?

James A. Lydston, Ph.D., M.D.
JAMA. 1893;XXI(26):989-990. doi:10.1001/jama.1893.02420780037015.
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To the Editor:  —Having devoted considerable attention to the study of cases presenting typical and indisputable illustrations of amblyopia exanopsia, I am disposed to respond to your query (in an editorial) in a recent issue of the Jour nal, Is there an amblyopia exanopsia? and place myself on record as being decidedly of the opinion that many cases of obtundedvision are properly ascribable to non-use of the eye in question, and can not justly be attributed to other causes. In order to induce us to accept such a condition, it seems that it is only requisite for us to revert to the fact that the process of seeing is virtually an educational one at the outset, and that while all of the requisite anatomic arrangements may be present in any given case, which are known to be essential for the visual performance, such as transparent optical media, physiologic accommodation, normal


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