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  • Title: The effects of hard and soft contact lenses on the corneal endothelium.
    Author: Mac Rae SM, Matsuda M, Shellans S, Rich LF.
    Journal: Am J Ophthalmol; 1986 Jul 15; 102(1):50-7. PubMed ID: 3728624.
    Abstract:
    We examined the morphologic characteristics of the corneal endothelium in three groups of contact lens wearers: those who had used daily-wear soft contact lenses for an average of 6.3 years, long-term (greater than 20 years) users of hard contact lenses, and former users of hard contact lenses who had worn them for an average of 9.6 years but who had discontinued them for an average of 4.3 years. When compared to age-matched controls, all groups had similar endothelial cell densities but demonstrated significant increases in variation of cellular size (polymegethism) and shape (pleomorphism). We found that daily-wear soft contact lenses can cause endothelial polymegethism and pleomorphism similar to those caused by hard contact lenses and that the endothelial changes induced by hard contact lenses are more profound with greater duration of wear and are apparently not completely reversible.
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