Dye orange and argon green laser photocoagulation effects on the retina and vitreoretinal interface.

We evaluated the effects of dye orange (595 nm) and argon green (514.5 nm) laser energy on the retina and the retinal internal limiting membrane. Moderate retinal coagulation was produced with each wavelength on the macular area of the monkey retina. Acute lesions demonstrated coagulative necrosis of the outer sensory retina, retinal pigment epithelium and choroid. The chronic lesions showed no morphologic evidence of alteration on the retinal surface by scanning electron microscopy. Our study indicated that moderate laser coagulation with these laser energies does not damage the vitreoretinal interface.