Germicidal lamps can damage corneas

In an article published in the journal of Ocular immunology and inflammation, doctors at the Bascom Palmer Eye Institute at the Miller School of Medicine at the University of Miami reported that several patients using germicidal lamps to try and disinfect themselves against the coronavirus have developed painful inflammation of the cornea, a condition called photokeratitis . These ultraviolet (UV) emitting devices available to consumers were used in an attempt to eliminate the coronavirus from homes and offices.

“At the height of the pandemic, we have noticed an increase in the number of patients suffering from irritation, pain and sensitivity to light,” said first author and Bascom Palmer resident Jesse Sengillo, MD. “We realized it was after direct exposure to germicidal lamps. emit UV light in the C range to kill bacteria and viruses. It can be quite a painful experience for the patient, but with quick topical lubrication and antibiotics to prevent infection, patients often do very well. “

UV photokeratitis occurs when the cornea is overexposed to ultraviolet rays. This can occur at high altitudes, where less UV rays are absorbed by the atmosphere, or near water, snow or other reflective surfaces in the environment. A few hours after exposure, patients experience burning eyes and sometimes intense sensitivity to light.

There are many germicidal lamps on the market, and while they may be safe for home use, customers should pay special attention to the manufacturer’s recommendations to avoid damage to the eyes and skin.

“The patients we encountered were unaware of these recommendations, and many were unknowingly exposed at work,” said co-author and resident colleague Anne Kunkler, MD, BS “For devices emitting UV-C, it is best to leave the room while the device is turned on. Our patients were exposed to direct light for different lengths of time. A few hours later they felt uncomfortable and consulted doctor. “

Dr Sengillo and his colleagues encourage anyone who experiences eye discomfort after exposure to any of these devices to promptly consult a healthcare practitioner with an ophthalmologist.

While germicidal lamps are purchased to protect people during the pandemic, this study did not attempt to determine whether they are effective in destroying coronaviruses. “There have been many publications related to COVID-19 recently. It is important that we disseminate information in an accurate and responsible manner to avoid public confusion.” Dr Sengillo and colleagues note that some germicidal devices emitting UV-C have been shown to be effective in killing various microbes and viruses, but to the authors’ knowledge, they have not yet been tested specifically against COVID-19. “Our study was not designed to answer that question. If you choose to use these lamps, just be sure to follow the manufacturer’s recommendations closely to avoid unnecessary injury,” said Dr. Sengillo.

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