The recti muscles act on the eyeball from a common origin. Their normal directions prolonged backward would pass practically to a common point in the outer, lower wall of the optic foramen. Their differences of action depend on differences of insertion. By lateral displacement of its insertion one rectus might be made to take up the function of either of the others. A displacement of not more than 15 mm. up or down, and out, would cause the internus to perform the function of the superior or the inferior rectus.
Some lateral displacement of the insertion of the recti tendons is possible; and any portion of such lateral displacement can bring about a corresponding change of function. Conceive a plane passed through the insertions of the recti muscles roughly perpendicular to the antero-posterior axis of the eyeball, intersecting the sclera in the circumference of a circle. Then the new function
JACKSON E. LATERAL DISPLACEMENT OF TENDON INSERTIONS FOR THE CURE OF STRABISMUS. JAMA. 1905;XLV(8):522–525. doi:10.1001/jama.1905.52510080020002e
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: