A study was conducted to test the hypothesis that rubbing a contact lens in the cleaning process, as recommended by the manufacturer, may develop scratches on the surface of the lens. Twenty-one hard lenses and 27 soft lenses were rubbed for 30 minutes each with a cleaning solution to simulate three months' worth of cleaning. Each lens was photographed both before and after the rubbing process. Results from the study showed that, of the lenses received unscratched from the manufacturer, 80% were scratched due to the rubbing process. These scratches may become sites for deposits of contaminants on the surface of the lens, which may result in patient discomfort and dissatisfaction, and eventual lens replacement or discontinued wearing.
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