Related Experiment Video
Updated: Jun 14, 2026
Corneal Sensitivity Testing Procedure for Ophthalmologic and Optometric Patients
Published on: August 2, 2024
Contrast sensitivity measurement with 2 contrast sensitivity tests in normal eyes and eyes with cataract
Young Taek Hong1, Sang Woo Kim, Eung Kweon Kim
1Department of Ophthalmology, Yonsei University College of Medicine, Institute of Vision Research, Seoul, Korea.
Purpose:
To assess the reliability of and correlation between 2 contrast sensitivity tests in normal eyes and eyes with cataract.
Setting:
Department of Ophthalmology, Yonsei University Hospital, Seoul, Korea.
Methods:
The Vision Contrast Test System (wall-chart test) and Optec 6500 system (view-in test) were used to measure contrast sensitivity in normal eyes at 2 visits separated by 2 weeks and in eyes with cataract before and 2 months after cataract surgery. The test-retest reliability and correlation were calculated by the intraclass correlation coefficient (ICC), coefficient of repeatability (COR), and 95% range of difference using the Bland-Altman method.
Results:
The study evaluated 40 normal eyes of 20 subjects and 44 eyes of 38 cataract patients. The repeatability of the 2 test methods was generally acceptable. The view-in test performed better than the wall-chart test in the ICC analysis (0.85 versus 0.65) but not in the COR analysis (+/-0.20 log versus +/-0.27 log). Correlation between the 2 tests was poor in both groups of eyes. The ceiling effect was greater with the wall-chart test. The floor effect occurred mainly in patients with cataract, in which it was greater preoperatively than postoperatively; at high frequency; and with the view-in test.
Conclusion:
Based on the ceiling and floor effect, the view-in test is better for detecting subtle contrast sensitivity changes in normal or near-normal eyes and the wall-chart test is useful in eyes with compromised vision.
Financial Disclosure:
No author has a financial or proprietary interest in any material or method mentioned.
