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

Purpose: To determine ocular refraction, corneal thickness, corneal radius, corneal power, corneal astigmatism and intraocular pressure in patients before and immediately after repeated hyperbaric oxygen (HBO2) exposures twice a week during six weeks of HBO2 therapy.

Methods: 23 patients received HBO2 therapy at 2.4 ATA for 90 minutes daily in monoplace chambers for six weeks, five days a week.

Myopic Shift during Hyperbaric Oxygenation Attributed to Lens Index Changes.

Purpose: To examine ocular lens parameters and structural changes to elucidate mechanisms underlying the myopic shift and cataract-related changes that occur in some patients during hyperbaric oxygen (HBO) therapy.

Methods: Scheimpflug images (Nidek EAS-1000) of the crystalline lens, measurements of scattered light, objective refraction, keratometry, tonometry, and axial length of the eye were obtained after the first day of HBO therapy and repeated when patients had completed 19 days of the treatment.

Results: Significant reduction in mean (± SD) optical density was found in the lens nucleus, -2.

Posterior segment changes of the eye during hyperbaric oxygen therapy.

Purpose: To examine central retinal thickness, retinal and vitreo-retinal structures, and ocular blood flow during a standard protocol of hyperbaric oxygen (HBO2) therapy.

Methods: Retinal thickness and color scans of the vitreo-retinal structures were obtained before and after 19 days of HBO2 therapy in 15 patients by optical coherence tomography (OCT). Pulsatile ocular blood flow was measured by ocular blood flow tonometry.

Phakic and pseudophakic eyes in patients during hyperbaric oxygen therapy.

Purpose: To examine the optical components of phakic and pseudophakic eyes during hyperbaric oxygen (HBO) therapy, and to quantify their relative impact on ocular refractive changes.

Methods: HBO therapy was given to 16 phakic and six pseudophakic patients for 90 min daily at a pressure of 240 kPa, 5 d a week for 20 days. An eye examination was performed on the first day of HBO therapy and repeated when the patients had completed 19 days of the treatment.

Hypermetropia-succeeded myopia after hyperbaric oxygen therapy.

A 58-year-old man presented with a change in vision during hyperbaric oxygen (HBO) therapy. Subsequent follow-up visits showed a hypermetropic shift, which succeeded the myopic shift after each of two series of HBO treatments. The maximal refractive amplitude was 3.

Ocular refractive changes in patients receiving hyperbaric oxygen administered by oronasal mask or hood.

Purpose: The aim of this study was to quantify ocular refractive changes after a standard hyperbaric oxygen (HBO) treatment protocol and to characterize the time period of recovery.

Patients And Methods: Hyperbaric oxygen therapy was given for 90 min daily at a pressure of 240 kPa for 21 days. Oxygen was administered to 20 patients using an oronasal mask and to 12 patients using a hood.