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Related Experiment Videos

[Objective visual field measurement using "pupil perimetry"]

T Yoshitomi1, T Matsui, K Mukuno

  • 1Department of Ophthalmology, Kitasato University, School of Medicine, Kanagawa-ken, Japan.

Nippon Ganka Gakkai Zasshi
|October 1, 1996
PubMed
Summary
This summary is machine-generated.

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Pupil Perimetry objectively measures visual fields by mapping pupil area changes. This new system accurately detects visual field defects in various optic neuropathies.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Technology

Context:

  • Objective visual field measurement is crucial for diagnosing and monitoring optic nerve and visual pathway disorders.
  • Current methods like the Humphrey Field Analyzer (HFA) are widely used but can be time-consuming.
  • Developing novel, objective techniques for visual field assessment remains an active area of research.

Purpose:

  • To develop and validate a novel system called Pupil Perimetry for objective visual field measurement.
  • To assess the feasibility of using infrared pupillometry linked to a Goldmann perimeter.
  • To compare the results of Pupil Perimetry with a standard visual field testing device.

Summary:

  • A system was developed by linking an infrared pupillometry machine to a Goldmann perimeter.

Related Experiment Videos

  • The system maps changes in pupil area (mm²) in response to visual stimuli at various locations.
  • Optimal parameters included a background intensity of 10 apostilbs (Asb) and a target exposure of 0.25 seconds at 1,000 Asb.
  • The system successfully mapped visual fields up to 90 degrees laterally and 60 degrees nasally in normal subjects.
  • Visual fields generated by Pupil Perimetry in patients with homonymous hemianopsia, glaucoma, and Leber's optic neuropathy correlated well with results from the Humphrey Field Analyzer (HFA) 30-2 program.

    • Impact:

    • Pupil Perimetry offers a potentially faster and more objective method for visual field assessment.
    • This technology could aid in the early detection and management of various visual field defects.
    • The findings support Pupil Perimetry as a valuable tool in clinical ophthalmology and neuroscience research.