Binocular vision as possessed by man is a function of wonderful accuracy. With normal acuteness of vision the deviation of the visual axis one-fiftieth of one degree from the fixation point will produce intolerable confusion and blurring. A deviation of one-fiftieth of one degree means an error in the relative lengths of opposing muscles of 1/240 of one millimeter, 1/6000 of an inch, 1/2 of the diameter of a red blood corpuscle. Simply from the standpoint of mechanical exactness what are the chances of making a perfect adjustment of the ocular muscles by operation?
The first thought that should guide us in the operative treatment of strabismus is: Operations do not cure strabismus, but they can lessen its amount so that it may pass unnoticed or may be overcome by other measures. At its best, operation may be a necessary step toward cure. More frequently it is but a means
JACKSON E. PRINCIPLES CONTROLLING OPERATIVE INTERFERENCE IN STRABISMUS.. JAMA. 1902;XXXIX(18):1105–1106. doi:10.1001/jama.1902.52480440025001e
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