Wai KM, Vingopoulos F, Garg I, et al. - Since contrast sensitivity function (CSF) may better estimate a patient’s visual function compared with visual acuity (VA), researchers sought to assess the quick CSF (qCSF) method to measure visual function in eyes with macular disease and good letter acuity. Patients with maculopathies (retinal vein occlusion, macula-off retinal detachment, dry age-related macular degeneration and wet age-related macular degeneration) and good letter acuity (VA ≥ 20/30) were involved. One hundred fifty-one eyes with maculopathy and 93 control eyes with VA ≥ 20/30 were involved. Despite good VA relative to healthy control eyes, CSF measured with the qCSF active learning method was found to be significantly reduced in eyes affected by macular disease. A promising clinical tool for quantifying subtle visual deficits that would otherwise go unrecognized by current testing methods is the qCSF method.