Reproducibility of morphoscopic contrast sensitivity testing with the Visual Capacity Analyzer
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Updated: Jun 29, 2026
Visualizing Visual Adaptation
Published on: April 24, 2017
Hyung Kuen Lee1, Il Hwan Koh, Chul Myong Choe
1Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea.
Purpose:
To determine the reproducibility of morphoscopic contrast sensitivity test values in healthy subjects using the Visual Capacity Analyzer (VCA) (L2 Informatique).
Setting:
Institute of Vision Research, Department of Ophthalmology, Yong-Dong Severance Hospital, Yonsei University, Seoul, South Korea.
Methods:
Five healthy volunteers were recruited for this study. With the VCA, 1 eye of each person was tested with different sized letters displayed on a computer screen at 11 spatial frequencies ranging from low (3.0 cycles/deg [cpd]) to high (30.0 cpd). The measurement was repeated 5 times under 2 screen luminance levels (maximum and 3 cd/m2).
Results:
Under maximum luminance background, the coefficient of variation (CV) and reliability coefficient (RC) at the spatial frequencies examined ranged from 4.3% to 35.0% and 89.1% to 99.8%, respectively. Under a screen luminance of 3 cd/m2, the CV ranged from 0.5% to 15.9% and the RC, from 97.5% to 100.0%.
Conclusion:
At the spatial frequencies examined, morphoscopic contrast sensitivity testing using the VCA had a high level of reproducibility and may be useful in measuring a patient's visual function in the actual environment.
