Large iridotomies by the linear incision technique using the neodymium:YAG laser at low energy levels. A study using cynomolgus monkeys.
Multiple Q-switched neodymium:YAG (Nd:YAG) laser impacts at energy levels of 1.0 to 1.7 mJ, focused on the iris through the 103-diopter (D) iridotomy-sphincterotomy lens, were applied back and forth in a line across the radial fibers of the mid-peripheral iris in eyes of the cynomolgus monkey (Macaca fasicularis) to produce large iridotomies of controllable size. Oozing of blood was minimal and no lens capsule damage occurred. These iridotomies showed less iris concussion damage than did conventional Nd:YAG laser iridotomies made by directing high-energy laser shots through the Abraham lens upon a single iris spot.
D000818:Animals; D005260:Female; D007498:Iris / Q000601:surgery*; D053685:Laser Therapy / Q000379:methods*; D008252:Macaca fascicularis; D008297:Male