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Related Experiment Videos

Optimum parameters for short-wavelength automated perimetry

P A Sample1, C A Johnson, G Haegerstrom-Portnoy

  • 1Department of Ophthalmology, University of California, San Diego, La Jolla.

Journal of Glaucoma
|December 1, 1996
PubMed
Summary

Standardizing short-wavelength automated perimetry (SWAP) requires specific parameters. A yellow background with a blue stimulus optimizes SWAP for better clinical use and data comparison.

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Area of Science:

  • Ophthalmology
  • Visual Science
  • Perimetry

Background:

  • Short-wavelength automated perimetry (SWAP) is a visual field test.
  • Standardization is needed for reliable clinical comparisons.

Purpose of the Study:

  • Determine optimal parameters for SWAP.
  • Recommend these parameters for procedural standardization.

Main Methods:

  • Evaluated various stimulus and background configurations.
  • Measured threshold versus intensity curves.
  • Assessed effects of lens absorption and cataract.

Main Results:

  • Optimal parameters: 100 cd/m2 broad-band yellow background.
  • Optimal stimulus: 440-nm, 1.8-degree diameter, 200 ms duration.

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  • Recommendations provided for modifying existing perimeters.

    • Conclusions:

    • Agreement on SWAP parameters will enable test standardization.
    • Facilitates comparison of results across different centers.
    • Improves clinical utility through normative data integration.