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It is well known that contact lenses, particularly rigid gas permeable contact lenses, alter corneal topography. In their study of the effects of rigid gas permeable lenses on myopia progression, Walline et al1 concluded that soft contact lenses are associated with more corneal steepening over a 3-year period as compared with rigid gas permeable lenses. The mean difference was small but statistically significant. Perhaps it was an inadvertent omission (or perhaps I misread the article), but nowhere in the “Methods” section is there reference to discontinuation of contact lens use prior to the follow-up examinations. Without discontinuation of contact lens wear, the study supports what we already know: rigid gas permeable contact lenses cause more corneal warpage than soft contact lenses.
Correspondence: Dr Davidorf, Davidorf Eye Group, Jules Stein Eye Institute, 7320 Woodlake Ave, Suite 190, West Hills, CA 91307 (drj@davidorf.com).
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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