title: Colour vision in diabetic and normal pseudophakes is worse than expected.
abstract: Automated colour vision testing in pseudophakes showed unexpected results. Chromatic discrimination sensitivity was measured in 22 diabetic pseudophakes with no retinopathy, 23 diabetic pseudophakes with background retinopathy and 34 non-diabetic pseudophakes. These results were compared with those in age-matched normal and diabetic phakic subjects, all of whom had good vision. The diabetics were also matched for retinopathy grading and duration of diabetes. In all three groups, red-green discrimination sensitivity was worse in the pseudophakes when compared with the corresponding phakic subjects (normals, p < 0.001; no retinopathy, p = 0.467; background retinopathy, p = 0.057). However, tritan vision was marginally worse in the normal pseudophake group but was better in the two diabetic pseudophake groups, when compared with phakic controls. This may be due to a reduction in tritan sensitivity in age-matched phakic controls from the effects of increased lens yellowing with age.
authors.affiliation: Sussex Eye Hospital, Brighton, UK.
authors.forename: P J
authors.initials: PJ
authors.lastname: Knowles
authors.forename: S J
authors.initials: SJ
authors.lastname: Tregear
authors.forename: L G
authors.initials: LG
authors.lastname: Ripley
authors.forename: A G
authors.initials: AG
authors.lastname: Casswell
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D002386:Cataract / Q000150:complications*; D002387:Cataract Extraction; D003118:Color Perception; D003117:Color Vision Defects / Q000150:complications* / Q000503:physiopathology; D048909:Diabetes Complications; D006801:Humans