THE CATARACT surgeon is enabled to perform his task with greater delicacy and precision when the patient and his eyes are quiet and relaxed. Rigidity and muscular spasm may be the effect of apprehension, fear or worry, or they may be reflex to pain or discomfort. They are the source of many of the complications arising during the operation.
PROBLEM OF MUSCULAR RIGIDITY AND SPASM
The manner in which muscular rigidity and spasm may affect the patient undergoing cataract surgery is manifold.
The Ocular Muscles.
—The orbicularis, corrugator and superciliaris muscles have long been indicated as the "squeezing muscles," and the patient reacting by contracting these muscles, is known as a "squeezer." Bell's phenomenon of the upward rolling of the eyes when one or both are closed is familiar. The inadvertent casting about of the eyes, their aimless or incoordinate rolling, or, after an attempt to look down on command,
KIRBY DB. USE OF CURARE IN CATARACT SURGERY. Arch Ophthalmol. 1950;43(4):678-693. doi:10.1001/archopht.1950.00910010689006