Overall length: 103mm, Outer dimension: 12.5mm, Inner dimension: 9.5mm, 45 degree angle. Designed for the Hyperopic LASIK procedure; Base of ring has a hinge protector that prevents the laser from ablating the hinge as it scans the bed of the flap; The ring fits into the stromal bed allowing complete protection of the peripheral epithelium, preventing potential epitheial ingrowth or epithelial erosions
