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Morning vs nighttime replacement affects adverse events with extended-wear contact lenses
Date:12/10/2012

Philadelphia, Pa. (December 10, 2012) - For people using 30-day extended-wear/continuous-wear (EW/CW) contact lenses, replacing lenses at night doesn't lower the risk of complications compared to changing lenses monthly, suggests a study "The Effect of Daily Lens Replacement During Overnight Wear on Ocular Adverse Events", appearing in the December issue of Optometry and Vision Science, official journal of the American Academy of Optometry. The journal is published by Lippincott Williams & Wilkins, a part ofWolters Kluwer Health.

In contrast, replacing lenses every morning reduces the overall rate of "ocular adverse events," reports the study by Jerome Ozkan, BOptom of Brien Holden Vision Institute, Sydney, and colleagues. The researchers write, "Contact lens wearers on an EW/CW schedule should be advised to minimize lens handling prior to sleep to reduce the risk of complications."

Morning or Night versus Monthly Lens Replacement

The "proof of concept" study evaluated the effects of morning versus night replacement and lens handling in 215 patients using silicone hydrogel EW/CW contact lenses. Extended/continuous wear lenses are designed to be worn continuously for up to a month, including overnight. But in the study, patients put in fresh EW/CW lenses every dayeither at night before going to sleep or in the morning after waking.

At regular clinic visits, adverse events were compared for patients who replaced their lenses in the morning or at night. Adverse event rates were compared to those in a similar, previously studied group of patients who wore EW/CW lenses continuou
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Contact: Connie Hughes
Connie.Hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

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