Lubricant effects on low dk and silicone hydrogel lens comfort.

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Lubricant effects on low dk and silicone hydrogel lens comfort. Optom Vis Sci. 2008 Aug;85(8):773-7 Authors: Ozkan J, Papas E PURPOSE.: To investigate the influence of three lubricants of varying viscosity, on postinsertion and 6 h comfort with contact lens wear. METHODS.: Comfort and associated symptoms of dryness were assessed in 15 experienced contact lens wearers. Subjects wore a low Dk lens in one eye and a silicone hydrogel in the other and participated in four separate trials involving no lubricant (baseline), saline, and two commercially available lubricants of differing viscosity. The in-eye lubricants were used immediately following lens insertion and every 2 h postinsertion for a 6 h wear period. RESULTS.: Postlens insertion comfort was significantly better for both lens types when lubricants or saline were used compared with no lubricant use. After 6 h lens wear, comfort was influenced by lens type and not by in-eye lubricant or saline use. Also after 6 h lens wear, less dryness sensation was reported for silicone hydrogel lenses when using lubricants but not saline. DISCUSSION.: Although lubricant use does help reduce dryness symptoms with silicone hydrogel lens wear, there appears to be minimal longer-term benefit to comfort. Furthermore, increased lubricant viscosity did not lead to improved longer-term comfort. PMID: 18677241 [PubMed - in process]

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