Jan 24 2008
New research suggests that a novel silicone hydrogel material could help keep contact lens wearers from discarding their contacts due to discomfort caused by feelings of dryness, the most commonly reported reason people discontinue contact lens wear.
Using a controlled clinical model for evaluating dryness, researchers report that patients experienced less discomfort while wearing contact lenses made with senofilcon A (ACUVUE(R) OASYS(TM). Brand Contact Lenses) than they did either while wearing no lenses or while wearing their usual contact lenses in a controlled adverse environment. The findings appear in the current issue of Current Medical Research and Opinion.
Contact lens wearers frequently complain of sensations of eye discomfort and dryness associated with wearing their lenses. Roughly 51 percent of lapsed lens wearers cite discomfort as the primary reason they discontinued wearing their lenses. Forty percent attribute their contact lens abandonment to dryness.
"Most soft contact lenses materials have demonstrated a susceptibility to environmental factors which can lead to clinical symptoms normally associated with ocular dryness," says Sheila Hickson-Curran, Director, Medical Affairs, Vistakon. "In addition to humidity, variables such as air movement (wind), temperature, and blink-rate altering visual activities such as reading and computer use can exacerbate signs and symptoms of dryness in contact lens wearers."
"Senofilcon A has previously shown promising results for reducing lens-wear related symptoms of dryness and discomfort," she adds. "This study shows that contact lenses made with senofilcon A may be superior to other soft lens materials in terms of minimizing dryness symptoms associated with exposure to adverse environmental conditions. Senofilcon A was also found to reduce discomfort symptoms even beyond that experienced with no lens, indicating a protective effect."