title: Multiple-pulse laser retinal damage thresholds.
abstract: The additivity from multiple exposures of the retina to laser light sources is investigated with regard to empirical and theoretical models. Prior data indicate additivity consistent with a total-on-time formulation in the case of point source conditions but not for extended source conditions. Thermal model calculations agree with the extended source results, but only agree with point-source data when the pulse repetition rate is higher than 10 Hz. The anomaly at low pulse repetition rates can still be interpreted in terms of a thermal damage mechanism if spatial variations are considered.
mesh_terms: D007834:Lasers / Q000009:adverse effects*; D008433:Mathematics; D008452:Maximum Allowable Concentration; D008954:Models, Biological; D012160:Retina / Q000293:injuries*