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April 1932


Author Affiliations

Edgewood, B. C.

Arch Ophthalmol. 1932;7(4):623-625. doi:10.1001/archopht.1932.00820110137014

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To the Editor.—May I venture to make some comments on Dr. Luedde's interesting paper on "The Mechanism of Accommodation," published in the January issue, page 40.

A. First of all, I think from a study of much literature and many pictures, that the anterior extremity or "origin" of the ciliary muscle is very near Schlemm's canal. Its tendon of origin may, according to Arthur Thomson, influence the lumen of Schlemm's canal. The circular portion of the muscle during life is probably in the plane of the equator, being situated behind the root of the iris.

It is even possible that the anterior extremity of the muscle may be connected with the dilatator muscle of the iris.

Only a part of the ciliary muscle, therefore, lies behind the plane of the equator of the lens.

B. Second, with regard to zonular relaxation in accommodation, nearly all authorities are agreed, except

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