title: A neodymium-YAG endolaser.
abstract: We used a CW-YAG endolaser to photocoagulate the fundus of the rabbit and monkey. We varied the power settings, exposure durations, and probe-retina distances to establish the parameters for threshold and bursting (choroidal hemorrhage) lesions. We found that the amount of energy needed to create a retinal lesion increased proportionally with the distance between the probe and the retina. To produce a choroidal hemorrhage at a given distance required at least four times the power required for a threshold coagulative lesion at the same distance. We also found that we could achieve a strong choroidal reaction without hemorrhage by using the coagulative threshold parameters of power and distance with an increased exposure time. Photocoagulation of the retina using the CW-YAG depended on the presence of melanin.
mesh_terms: D000818:Animals; D002829:Choroid / Q000601:surgery; D005451:Fluorescein Angiography; D053685:Laser Therapy; D007834:Lasers / Q000295:instrumentation* / Q000379:methods; D008252:Macaca fascicularis; D009354:Neodymium; D011817:Rabbits; D012160:Retina / Q000601:surgery
chemical_list: D009354:Neodymium