[Frankfurt-Freiburg Contrast and Acuity Test System (FF-CATS). A new test to determine contrast sensitivity under variable ambient and glare luminance levels]

Ophthalmologe. 2005 May;102(5):507-13. doi: 10.1007/s00347-004-1125-y.
[Article in German]

Abstract

Background: The purpose of the present study was to evaluate a computerized test for measurement of contrast sensitivity thresholds under variable ambient and glare luminance levels.

Methods: A total of 40 eyes of 40 healthy subjects were examined with the FF-CATS and the Functional Acuity Contrast Test (FACT) at 0.167 cd/m(-2) (mesopic) and 167 cd/m(-2) (photopic). Measurements were performed twice with and without glare in a randomized fashion. Tests were evaluated according to three criteria: (1) repeatability, (2) discriminative ability, and (3) validity.

Results: The FF-CATS showed a higher discriminative ability between the two groups compared to the FACT charts. Under photopic conditions, the COR value was 0.39 for the FF-CATS and 0.26 for the FACT charts; under mesopic illumination, the COR value for the FF-CATS was 0.46 and 0.36 for the FACT charts.

Conclusion: The FF-CATS is a reliable, sensitive, valid, and flexible test system for the determination of visual acuity and contrast sensitivity thresholds under variable ambient and glare luminance conditions.

Publication types

  • Clinical Trial
  • Comparative Study
  • Evaluation Study
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Age Factors
  • Aged
  • Contrast Sensitivity*
  • Data Interpretation, Statistical
  • Glare*
  • Humans
  • Middle Aged
  • Prospective Studies
  • ROC Curve
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Sensory Thresholds
  • Vision Tests* / instrumentation
  • Vision Tests* / methods
  • Visual Acuity*
  • Visual Perception*