Clinical testing of contrast thresholds using a commercial television monitor system.

@article{Vingrys1998ClinicalTO,
  title={Clinical testing of contrast thresholds using a commercial television monitor system.},
  author={Algis Jonas Vingrys and Andrew J Anderson},
  journal={Clinical & experimental optometry},
  year={1998},
  volume={81 6},
  pages={238-244}
}
Background: The Medmont AT-20 has incorporated a contrast threshold test using a predetermined letter size that can be applied in clinical settings. This paper describes a pilot study that evaluates this technology and the effects of certain parameters on test outcomes. Methods: A photometric calibration of the test was performed to define the relationship between the AT-20 scale and Weber contrast (W%). We determined the effects of repeated measures (precision), target size (6/6 to 6/96… CONTINUE READING