Contrast sensitivity assessment of soft contact lens wearers

The contrast sensitivity function (CSF) of soft contact lens wearers and the CSF of those without corrective lenses were measured. Subjects without corrective lenses achieved higher contrast sensitivity (CS) scores than did those wearing soft contact lenses, whether tinted or clear. Subjects wearing clear soft contact lenses had slightly higher CSF at most spatial frequencies than did those wearing tinted soft contact lenses, but the difference was not significant. The implications of this research on the factors influencing CS function in contact lens wearers are discussed.