Reproducibility of morphoscopic contrast sensitivity testing with the Visual Capacity Analyzer.
OBJECTIVE
To determine the reproducibility of morphoscopic contrast sensitivity test values in healthy subjects using the Visual Capacity Analyzer (VCA) (L2 Informatique).


METHODS
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%.


CONCLUSIONS
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.
Lee
Hyung Kuen
HK
Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, South Korea.
Koh
Il Hwan
IH
Choe
Chul Myong
CM
Kim
Chan Yoon
CY
Hong
Young Jae
YJ
Seong
Gong Je
GJ
D000328:Adult; D015350:Contrast Sensitivity; D003936:Diagnosis, Computer-Assisted / Q000592:standards; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D015203:Reproducibility of Results; D014787:Vision Tests / Q000295:instrumentation / Q000592:standards