Suprathreshold Contrast Sensitivity Vision Test Chart
Annual progress rept.
VISION SCIENCES RESEARCH CORP SAN RAMON CA
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This research period concentrated on the further design and development of a suprathreshold contrast sensitivity test chart with which to create a family of contrast matching functions. Three different chart configurations were developed and tested for suitability. Preliminary test- retest, subject instruction, and chart configuration experiments were completed. The results show good test-retest reliability. Individual differences in contrast matching using previously developed suprathreshold contrast sensitivity charts are also evident in these new data. Different subject instructions having the subjects either make the contrast judgements using global or local contrast analysis resulted in similar results. The spatial positioning of grating test patches appears to bias the contrast matches and warrants further investigation. Future research will finalize the suprathreshold contrast sensitivity chart configuration and compare the resulting contrast matching data to that obtained using a computer-video system and continuous contrast test increments. The final chart will be used for large population, clinical and performance testing. Keywords Suprathreshold vision Visual perception.
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