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Related Experiment Videos

Frequency doubling perimetry in resolved optic neuritis.

N Fujimoto1, E Adachi-Usami

  • 1Department of Ophthalmology, Chiba University School of Medicine, Japan. fujimoto@ophthalm.m.chiba-u.ac.jp

Investigative Ophthalmology & Visual Science
|August 11, 2000
PubMed
Summary

Frequency doubling technology (FDT) revealed magnocellular cell loss in patients recovering from optic neuritis. Visual field deficits improved over one year, indicating functional recovery of these cells.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Visual Science

Background:

  • Optic neuritis can affect magnocellular (M) cells, crucial for visual processing.
  • Frequency Doubling Technology (FDT) is sensitive to M-cell dysfunction, often seen in glaucoma.

Purpose of the Study:

  • To assess visual field changes using FDT in patients with recovered optic neuritis.
  • To investigate potential loss of extrafoveal M cells post-optic neuritis.

Main Methods:

  • 14 patients with resolved optic neuritis underwent Humphrey automated perimetry and FDT.
  • Visual fields were analyzed in zones, comparing involved, uninvolved, and healthy eyes.
  • Re-examinations occurred after 1 year to track changes.

Main Results:

Related Experiment Videos

  • Conventional perimetry showed foveal depression; FDT revealed broader, especially midperipheral, deficits.
  • FDT detected general visual field depression in affected eyes.
  • Both FDT and conventional perimetry showed improvement in deficits after 1 year.

Conclusions:

  • Resolved optic neuritis is associated with M-cell dysfunction in the extrafoveal region.
  • FDT can detect this M-cell loss and its subsequent partial recovery.
  • Findings suggest FDT's utility beyond glaucoma detection.