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Rarebit perimetry: normative values and test-retest variability.

Chee-Fang Chin1, Leonard W Yip, Danny C Sim

  • 1Department of Ophthalmology, Tan Tock Seng Hospital, Singapore. chee_fang@yahoo.com

Clinical & Experimental Ophthalmology
|November 5, 2011
PubMed
Summary
This summary is machine-generated.

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Rarebit perimetry provides reliable visual field testing. This study establishes normative values for central and foveal fields, noting age-related decreases and potential clinical significance in central field test-retest variability.

Area of Science:

  • Ophthalmology
  • Visual Science
  • Medical Technology

Background:

  • Establishing normative values for visual field tests is crucial for diagnosing and monitoring eye conditions.
  • Rarebit perimetry is a visual field testing method that requires normative data for accurate interpretation.
  • Understanding test-retest variability is essential for assessing the reliability of any diagnostic test.

Purpose of the Study:

  • To establish normative values for the central and foveal field tests of rarebit perimetry version 4.
  • To evaluate the test-retest variability of rarebit perimetry in normal subjects.
  • To determine if age influences rarebit perimetry results.

Main Methods:

  • A prospective study involving 54 normal subjects was conducted.

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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential

Published on: May 25, 2020

  • Subjects underwent rarebit perimetry testing for central and foveal fields, repeating the test within one month.
  • Mean hit rates from one eye of each subject were analyzed.

    • Main Results:

    • Overall normative mean hit rates were 86.3% for the central field and 91.6% for the foveal field.
    • A 0.47% decrease in central mean hit rates was observed for each increasing year of age (P < 0.001).
    • No significant test-retest variability was found in the foveal field (P = 0.554), while the central field showed significant variability (P < 0.001) with a potentially clinically significant 3.5 unit increase.

    Conclusions:

    • Rarebit perimetry is a repeatable and reliable method for visual field testing.
    • Normative values for central and foveal fields have been established for two age groups.
    • The findings support the clinical utility of rarebit perimetry in assessing visual fields.