Rabbit retinal function after Nd -YAG laser treatment

The aim of this work is to test the functional stat e of the eye retina exposed to neodymium yag (Nd:YAG) laser beam of the same intensity and duration as that used in lens posterior capsulotomy after cataract surger y. Rabbits’ eyes were exposed to laser beam(1064nm, 0.01w/cm 2 and exposuretime of 0.25 sec and 0.1 sec).Changes i n the bioelectricity of the retina were investigated. The experiments were performed on light and dark adapted eyes of rabbits for control and af terNd:YAGlaserexposure. Theelectroretinogram; ERGwas recordedin both cases of dark and lightadaption. We tried to adapt the physical conditions surrounding the exposed eye during laser exposureand during the measurements. The ERG response was found to be reduced by about 50%. Selected a-wave & b-wave of the recordedERG signal,before and after exposure, were measuredin case of laser exposure ti mes 0.25 sec, 0.1 sec in case of dark and light adaptation. The obtained results ind icated a significant reductionin the awave& b-wave amplitudes, more significantly in case of the longer exposure time. This reduction after treatment, made slow recovery after 4 days and approached to its control values after 8 days of exposure. The late e ffect studies indicated a faster recovery for the shorter exposure time.