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The proof of my theory on the causation of myopia is obvious. In addition to various clinical observations and theoretical considerations, I submit the following evidence:
It has been demonstrated by me, and later by others, that the eye drops when the body and head are bent forward.
I have observed that it is possible to make apes myopic in most instances if the animals are kept in a horizontal position. (This test was used by others and found to be correct.)
It has been observed that the characteristic signs of myopia often develop in artificially short-sighted animals. (This has been confirmed by others.)
The anatomic alterations of the officially short-sighted animals are very similar to those seen in the human myopic eye. This is confirmed by others.
Finally, a physical test was devised. I have demonstrated that a rubber ball attached to
LEVINSOHN G. REPLY TO CRITICISMS OF MY THEORY ON THE GENESIS OF MYOPIA. Arch Ophthalmol. 1936;15(1):84–85. doi:10.1001/archopht.1936.00840130094010
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