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- W4247510151 abstract "Purpose: To investigate the effects of early cataract on spatial frequency dependent contrast sensitivity (CS) measurement and log MAR visual acuity (VA) assessment. Methods: The relative sensitivity of two computer-generated letter CS tests, 1/9.5 letter CS (1/9.5 LCS) (assessing low to medium spatial frequency CS) and 6/9.5 letter CS (6/9.5 LCS) (measuring high spatial frequencies), and a log MAR VA test were evaluated in 19 subjects with early cataract and 21 age-matched controls. Results: Results indicate that these three tests decline with increasing cataract formation. The greatest visual reduction and the highest test discriminative ability were found with the 6/9.5 LCS test (Az score of 0.441 versus 0.408 for VA) and the lowest with the 1/9.5 LCS test (Az score of 0.383). However, measurement variability was greatest for 6/9.5 LCS. After correcting for this variability, the 6/9.5 LCS test still proved slightly more sensitive to early cataract and cataractous change than the other two measurements. Conclusion: The study suggests that 6/9.5 LCS or other size small letter CS tests are able to detect more subtle vision loss in cataract than visual acuity." @default.
- W4247510151 created "2022-05-12" @default.
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- W4247510151 date "1996-05-01" @default.
- W4247510151 modified "2023-09-26" @default.
- W4247510151 title "The relative sensitivity of visual acuity and small letter contrast sensitivity in early cataract" @default.
- W4247510151 doi "https://doi.org/10.1016/0275-5408(96)83350-3" @default.
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