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Objective predictors of subjective visual function for different age‐related cataract morphologies
Author(s) -
HakimBanan N.,
Horgan S. E.,
Hull C. C.
Publication year - 2002
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2002.00086_11.x
Subject(s) - visual acuity , contrast (vision) , medicine , ophthalmology , optometry , audiology , artificial intelligence , computer science
Purpose: To find objective chart tests that give a measure of visual function in the different age‐related cataract morphological groups and can be applied in a clinical setting. Methods: Subjects with age‐related cataract ( N = 33) were recruited to the study from both private optometric practice and a hospital eye department. All subjects underwent LOCS III grading of their cataract and had their functional vision assessed using the VF‐14 questionnaire. High (96%) and low (16%) contrast logMAR visual acuity were measured together with Pelli–Robson contrast sensitivity. A stepwise linear regression was then performed on the data to find significant predictors for VF‐14 in the three age‐related cataract morphological groups as well as in a mixed group. Results: Low contrast logMAR visual acuity was a significant predictor of VF‐14 in the cortical ( p = 0.014 ) and nuclear ( p = 0.024 ) subgroups. For the mixed morphological group both high and low contrast visual acuity were significant predictors ( p < 0.03 ). There were only three subjects with pure posterior subcapsular cataract and so no meaningful analysis could be performed. Conclusions: Low contrast logMAR visual acuity may be a better predictor of visual function in cortical and nuclear cataract compared with high contrast logMAR visual acuity or Pelli–Robson contrast sensitivity.