Fox TP, et al. - A cross-sectional study is carried out to assess the relationship amongst obstructive sleep apnea (OSA) and quantitative markers of eyelid laxity or secondary ocular surface disease in a sleep clinic population. Among individuals referred for overnight polysomnography, quantitative markers of eyelid laxity were not related to the presence or severity of OSA. Subset investigation proposes that prior studies may have been limited by confounding variables or the technique of identifying eyelid laxity.