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Investigative Ophthalmology & Visual Science, Vol 27, 795-798, Copyright © 1986 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

A comparison of Nd:YAG laser damage thresholds for PMMA and silicone intraocular lenses

PE Bath, AB Romberger and P Brown

Power density producing damage at a probability of 0.5 (ie, damage threshold, DT-50) was determined for PMMA (with/without UV absorber) and Silicone intraocular lenses. Scattered light from a collinear diagnostic He:Ne beam was one of four damage monitors deployed to enhance the sensitivity of the system. In order of increasing laser resistance the following results were obtained: injection molded PMMA (1.9/GW/cm2) Silicone (2.63 GW/cm2) Lathe-cut PMMA (4.47 GW/cm2), Lathe- cut PMMA with UV absorber (8.32 GW/cm2), Cast-molded PMMA (12.30 GW/cm2). An analysis of variance revealed interclass differences significant at the .01 level. Cast-molded PMMA was the most laser- resistant IOL material.




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Copyright © 1986 by the Association for Research in Vision and Ophthalmology