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The recently published study by González-Pérez et al1 is described as a prospective, case-control study; however, this is incorrect. The study participants were selected based on an exposure of interest, continuous wear of contact lenses, and were matched with controls with respect to age, refractive error and …
Contributors GM contributed to the conception of the letter and final approval of the version to be published. CH and GM contributed in drafting and revising the letter critically for important intellectual content. No other people were involved in this work.
Funding This editorial was supported by grant number 5UL1 RR025777-04 from the NIH National Center for Research Resources.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.