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Related Experiment Videos

VISTECH contrast sensitivity testing in primary open angle glaucoma

A Mathai1, R Thomas, A Braganza

  • 1Schell Eye Hospital, Christian Medical College, Vellore, India.

Indian Journal of Ophthalmology
|June 1, 1997
PubMed
Summary
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Contrast sensitivity testing using Vistech charts is not effective for screening or diagnosing primary open angle glaucoma (POAG). The test showed poor sensitivity and specificity in distinguishing between POAG patients, suspects, and controls.

Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • Contrast sensitivity (CS) is a recommended metric for primary open angle glaucoma (POAG) screening and diagnosis.
  • Age-related decline in CS is a known phenomenon.

Purpose of the Study:

  • To evaluate the utility of Vistech contrast sensitivity charts in identifying POAG.
  • To assess the sensitivity and specificity of CS testing in POAG screening and diagnosis.

Main Methods:

  • 184 eyes from 95 patients were tested using Vistech charts.
  • Participants were categorized into three groups: established POAG, glaucoma suspects, and age-matched controls.

Main Results:

  • CS distributions were similar across all three groups.
  • POAG patients showed CS at the lower limit of normal; suspects and controls were within normal limits.

Related Experiment Videos

  • CS testing demonstrated a sensitivity of 55.4% and specificity of 69.5% for POAG detection.
  • Sensitivity and specificity for detecting visual field defects were 47.3% and 73.3%, respectively.

    • Conclusions:

    • Vistech contrast sensitivity testing is not a useful tool for POAG screening or diagnosis.
    • The test has limited value in detecting associated visual field defects.