Comparative surface analysis of intraocular lenses.
In 1977 a study using scanning electron microscopy (SEM) to examine intraocular lenses found several undesirable lens surface characteristics. In early 1980, an apparent increase in patient complications with one lens style spurred a new study of 39 lenses from nine manufacturers. Most of these lenses appeared to have improved surface finishes when compared to the 1977 lenses. Both groups of lenses were compared to a series of 19 explanted lenses: similar surfaces were found on lenses of similar design. Some explanted lens styles which had not previously been examined exhibited characteristics considered undesirable in 1977. Typical results of the three studies are shown.
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