JAMA. 1927;89(8):594-596. doi:10.1001/jama.1927.02690080026010.
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Progressive myopia is a condition that has caused a lot of thought and worry to ophthalmologists. A great many theories have been advanced as to its cause and the reason for its progressive course for the worse. It is known that inheritance plays a rôle in the condition. Most authorities agree that close application of the eyes increases the myopia. Diet is believed by some to be a cause. Byers1 believes that it is dueto a weakness of the scleral coat, either congenital or the result of nutritive disturbances; also to prolonged application of the eyes for close work, such as is entailed by certain occupations or is imposed by the necessities of modern school life. He believes in prevention by exercise, diet and less use of the eyes.

Eldridge-Green2 outlines a history of the theories of progressive myopia, both the predisposing and the exciting causes in its


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