Histopathology and ultrastructure of krypton and argon laser lesions in a human retina-choroid

The authors studied a normal eye 24 hours after retinal treatment with argon and krypton photocoagulation. The findings indicate the relative sparing of the inner retina and greater choroidal effects of krypton when compared with argon photocoagulation. Bruch's membrane was not completely ruptured as long as the energy densities of burns were kept low. Krypton wavelengths are transmitted more effectively to the pigment epithelium and choroid. Therefore, the use of relatively lower and therefore safer power densities compared with the argon laser should suffice for the treatment of diseases at this level.