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Comparing Contact Lens and Refractive Surgery Risks
Oliver D. Schein, MD, MPH;
Joanne Katz, ScD
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There is little doubt that the effectiveness and safety of laser-assisted in situ keratomileusis (LASIK) have improved during the past decade. However, the comparisons that Mathers et al1 drew in their letter to the Archives and the conclusions reached in comparing contact lens and LASIK safety are inadequate and misleading.
First, the assumption that a 1-year (or annualized) risk of ulcerative keratitis associated with contact lens wear can be extrapolated to estimate a 10- or 20-year risk by simply multiplying by 10 or 20 is almost certainly wrong. Imagine a 10-year contact lens wearing span for an individual. If he or she survives the first 2 years, for example, without developing a corneal ulcer, then the risk will certainly be less throughout the succeeding years. This individual is, by definition, a "survivor," one whose underlying risk for disease is less than average. . . . [Full Text of this Article]
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RELATED LETTER
Comparing Contact Lens and Refractive Surgery Risks—Reply
William D. Mathers
Arch Ophthalmol. 2007;125(6):854-855.
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RELATED ARTICLE
Risk of Lasik Surgery vs Contact Lenses
William D. Mathers, Frederick W. Fraunfelder, and Larry F. Rich
Arch Ophthalmol. 2006;124(10):1510-1511.
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