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Related Experiment Videos

A perimetric learner's index

J Olsson1, P Asman, A Heijl

  • 1Department of Mathematical Statistics, Malmö University Hospital, University of Lund, Sweden.

Acta Ophthalmologica Scandinavica
|April 4, 1998
PubMed
Summary
This summary is machine-generated.

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A new learner's index can identify visual field test results in normal individuals that indicate inexperience. This index helps detect patterns suggesting a need for further visual field testing.

Area of Science:

  • Ophthalmology
  • Visual Science

Background:

  • Some individuals require more practice with perimetry to achieve normal visual field results.
  • Typical findings in inexperienced individuals include mid-peripheral visual field depressions with a normal central field.

Purpose of the Study:

  • To develop a "learner's index" to identify visual field patterns indicative of perimetric inexperience.
  • To differentiate between experienced and inexperienced visual field test results in normal subjects.

Main Methods:

  • The central visual field was divided into five zones to analyze deviations from age-corrected normal thresholds.
  • A learner's index, a linear discriminant function, was created using data from 74 normal subjects, comparing initial tests with experienced results.

Main Results:

Related Experiment Videos

  • Initial visual field tests in learners showed increased deviation from normal thresholds with greater eccentricity.
  • The learner's index effectively discriminates between experienced and inexperienced visual field results.

Conclusions:

  • The learner's index identifies initial visual field tests in normal eyes that deviate significantly from experienced results.
  • Patients with a significant learner's index score may benefit from repeated visual field testing.