Climbers not likely to endanger vision until 26,000 feet

MedPage Today (2/8, Fiore) reported that, according to a study published in the February issue of the Archives of Ophthalmology, “most climbers don’t have to worry about their high-altitude vision.” Researchers found that “corneal thickness did swell significantly among mountaineers at elevations up to 6,300 meters (about 21,000 feet), but they had no loss in visual acuity.” The researchers, however, “warned that altitudes above 8,000 meters, or 26,000 feet, ‘may result in profuse edema leading to dangerous visual loss.'”

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