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To the Editor:
—I read the article on agenesis of the medial rectus muscle, by Girard and Neely, in the March, 1958, issue, p. 337, with considerable interest, since he records the rarity of absence of an extraocular muscle. I should like to add a case of absence of lateral rectus muscle.About five years ago I operated on a child for overaction of an inferior oblique muscle. In clearing the muscle, I found it to be attached at the normal line of insertion of the lateral rectus. However, despite very careful exposure, no lateral rectus muscle was found. A very greatly overdeveloped inferior oblique was performing the function of both muscles. I proceeded to recess the inferior oblique and gained my goal without having to resort to surgery for weakness of abduction of that eye.I have recently transplanted slips from the vertical recti for weak medial and lateral
Seretan EL. AGENESIS OF THE MEDIAL RECTUS MUSCLE. AMA Arch Ophthalmol. 1958;60(2):351. doi:10.1001/archopht.1958.00940080367025