Suprathreshold Contrast Sensitivity Vision Test Chart
Final rept. 15 May 88-14 May 91,
VISION SCIENCES RESEARCH CORP SAN RAMON CA
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This research project further developed and tested the first-ever practical suprathreshold contrast test chart SCTS. The SCTS, which measures a family of suprathreshold contrast-matching curves, was found to be a valid and reliable test chart and extends our knowledge about spatial mechanisms in normal and abnormal vision by allowing extensive data collection due to its portability, and ease and speed of administration. Comparison of normative data collected in 336 eyes with data collected on patients having amblyopia, glaucoma and macular degeneration showed that the SCTS may be effectively used as an initial screening tool and for monitoring patients in clinical situations. Individual differences in contrast-matching curves, similar to those seen in contrast sensitivity, were seen in visually normal and clinical patients. The SCTS significantly predicts letter detection and discrimination above the predictive ability of contrast sensitivity by approximately 12.
- Anatomy and Physiology