In order to introduce a greater degree of certainty into the performance of cosmetic blepharoplasty, skin clamps have been devised to determine more exactly the shape and extent of tissue area to be excised. By placing the clamps so they pick up all excess tissue, the surgeon can view the effect of the planned excision before the surgical procedure is performed. Thus, he is enabled to steer a course between excess caution and consequent insufficient correction on the one hand, and the disaster of excess excision on the other.
Feldstein M. Skin Clamps in Cosmetic Blepharoplasty. Arch Ophthalmol. 1972;88(6):659-661. doi:10.1001/archopht.1972.01000030661019