[Retinochoroidal adhesions of diode laser endophotocoagulation lesions. 1. Histopathology of rabbit eyes].
I experimented with a prototype diode laser in order to determine how effective it is for intraocular endophotocoagulation of the retina and how much energy is required to produce chorioretinal adhesions. Retinal endophotocoagulation was performed in all 8 eyes of 4 rabbits. I used power settings at 100-140, 200 and 300 mW and an exposure time of 0.2 seconds. The lesions produced with powers of 100-140 mW were faint whitish spots surrounded by grayish rings. One month after photocoagulation, there were chorioretinal adhesions histologically. The lesions produced with powers of 200-300 mW were characterized by intense whitish spots surrounded by grayish rings and histologically they were over-irradiated ones. One month after photocoagulation, rupture of the internal limiting membrane could be seen in one of the 300 mW lesions. It can be said that the retinal burn which appeared ophthalmoscopically as a faint whitish spot surrounded by a grayish ring may be the most useful to produce chorioretinal adhesion.
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Department of Ophthalmology, Nihon University School of Medicine, Chiyoda-ku, Japan.
D000818:Animals; D002829:Choroid / Q000473:pathology* / Q000601:surgery; D008028:Light Coagulation / Q000379:methods; D011817:Rabbits; D012160:Retina / Q000473:pathology* / Q000601:surgery