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August 1981

The Effect of Cleaning Soft Contact Lenses: A Scanning Electron Microscopic Study

Author Affiliations

From the Department of Ophthalmology, Harvard Medical School, and the Department of Cornea Research, Eye Research Institute of Retina Foundation, Boston.

Arch Ophthalmol. 1981;99(8):1382-1386. doi:10.1001/archopht.1981.03930020256008

•ning electron microscopy was used to investigate the effectiveness of surfactant and enzyme cleaners in removremovcings from soft contact lenses. We examined ten continuously worn lenses and 15 lenses worn and cleaned regularly for at least six months. About 30% of t30% surface of continuously worn lenses cleaned with surfactant or enzyme was uncoated; smooth, matted coating covered the remainder. Continuously worn lenses cleaned with the combination surfactantzyme cleaner had similar deposits covering 50% of the surface. Lenses worn and cleaned regularly had more deposits after cleaning with surfactantenzyme than after cleaning with combination cleaner. Approximately 25% of the surface of lenses cleaned with the combination was coated with deposits. The deposits on both types of lenses were about 30% less thick after use of the combination cleaner than with either singleeaner. The coating on worn contact lenses is not completely removed by any method we tested.