Evaluation of Retinal Damage Produced by Long-Term Exposure to Laser Radiation.

摘要

The study reported here was designed with two objectives. The first objective was to determine whether or not photopigments may be involved in the production of 'nonthermal' lesions, and the second objective was to extend argon ED50 measurements for 'nonthermal' lesions to 1000-sec exposures. To accomplish the first objective, exposures were made for 120 seconds using a wavelength of 1060 nm. This wavelength, when absorbed at the retina, can produce a temperature rise but is inefficient in bleaching photopigments. Thus, lesions produced by these exposures should stem primarily from thermal changes. The results of these exposures were then compared to those obtained from exposure to a wavelength of 514.5 nm which readily interacts with photopigments.