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Short-term effects on ocular variables immediately after hyperbaric oxygen exposures.

Knut Evanger1, Guro Vaagbø2, Olav H Haugen1,3

  • 1Department of Clinical Medicine, Faculty of Medicine, University of Bergen, Bergen, Norway.

Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc
|September 22, 2018
PubMed
Summary

Repeated hyperbaric oxygen therapy caused a significant myopic shift in patients. Transient effects like corneal thinning and reduced intraocular pressure were observed immediately after exposure but resolved quickly.

Keywords:
hyperbaric oxygen therapyocular variablesshort-term effects

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Area of Science:

  • Ophthalmology
  • Hyperbaric Medicine

Background:

  • Hyperbaric oxygen (HBO2) therapy is used for various medical conditions.
  • Potential ocular side effects of HBO2 therapy require investigation.

Purpose of the Study:

  • To assess changes in ocular refraction, corneal properties, and intraocular pressure.
  • To evaluate effects before and after repeated hyperbaric oxygen exposures over six weeks.

Main Methods:

  • 23 patients underwent HBO2 therapy (2.4 ATA for 90 minutes daily, 5 days/week for 6 weeks).
  • Ocular measurements were taken using a Topcon TRK-1P instrument.

Main Results:

  • A significant myopic shift of -0.95 D occurred in both eyes (P < 0.001).
  • Immediate post-exposure effects included corneal thinning, reduced intraocular pressure, and myopic shift reversion.
  • These transient effects resolved before subsequent measurements.

Conclusions:

  • Both cumulative and short-term effects of HBO2 therapy influence ocular variables.
  • The timing of ocular measurements post-HBO2 exposure is critical for result interpretation and study comparison.