Kushner B J, Vrabec M
J Pediatr Ophthalmol Strabismus. 1987 May-Jun;24(3):126-31. doi: 10.3928/0191-3913-19870501-07.
The main effect of recession or resection of a rectus muscle is thought to be due to an alteration of its length-tension curve (Starling's Law). Because the subsequent straightening of the eye produces a movement of the new insertions of the rectus muscles either anteriorly or posteriorly in the orbit, the actual amount of tightening or shortening of the muscle is not equal to the amount of recession or resection. How much this phenomenon alters the true amount of tightening or shortening of a muscle has important implications in the determination of safe amounts of surgery, which may differ if one is operating on the fixing or non-fixing eye. In addition, the size of the globe should have an important role in determining the response per millimeter of surgery.
直肌后退或切除的主要作用被认为是由于其长度-张力曲线（斯塔林定律）的改变。由于随后眼球的变直会使直肌新附着点在眼眶内向前或向后移动，所以肌肉实际的收紧或缩短量并不等于后退或切除的量。这种现象在多大程度上改变了肌肉真正的收紧或缩短量，对于确定安全手术量具有重要意义，在对固定眼或非固定眼进行手术时，安全手术量可能会有所不同。此外，眼球大小在决定每毫米手术的反应方面应起重要作用。
