Considerations in Contact Lens Use Under Adverse Conditions Proceedings of a Symposium (1991) / Chapter Skim
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Medical Problems Associated With Contact Lens Use
Medical Problems Associated With Contact Lens Use
Pages 53-57
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From page 53... ...
Military medicine must help commanders define the benefits and risks of soft contact lenses. Some of the visual benefits are obvious and have been covered by previous speakers (e.g., increased visual field, elimination of lens fogging)
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From page 54... ...
They include chronic hyperemia, chronic conjunctivitis, vernal conjunctivitis, chronic allergic conjunctivitis, symblepharon of the conjunctive, pterygium, chronic staphylococcal blepharitis, stye, chalazion, trichiasis, entropion, ectropion, corneal degenerations, corneal dystrophies, corneal vascularization, recurrent keratitis, corneal ulcers, and dry eyes. NONMEDICAL CONSIDERATIONS The nonmedical problems associated with contact lenses have for the most part been discussed—edge glare, fluctuating vision with blinking and dehydration, bubbles beneath lenses, and displacement under positive G's.
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From page 55... ...
In another study up to 52 percent of patients wearing contact lenses had contaminated contact lens care systems, with 13 percent of commercial contact lens solutions being contaminated (Donzis et al., 1987~. While heat sterilization may kill bacteria and acanthamoeba, it markedly shortens the life of daily-wear lenses and cannot be used with the higherwater-content extended-wear lenses.
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From page 56... ...
The longterm effect on the human cornea of chronic exposure to higher levels of hydrogen peroxide is unknown. It is known that soft contact lenses cause polymegethism and pleomorphism, although less than the older PMMA hard contact lenses.
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From page 57... ...
Kirn, T.F. 1987 As number of contact lens users increases, research seeks to determine risk factors, how best to prevent potential eye infections.
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