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Here is an interesting study demonstrating the overall efficacy of silicone hydrogel lenses in reducing symptoms of dryness. Two-hundred seventy-eight hydrogel lens wearers were refitted with lotrafilcon lenses (Focus N&D) in this multicenter trial. The entire abstract may be found here.
The Stability of Dryness Symptoms After Refitting With Silicone Hydrogel Contact Lenses Over 3 Years.
Eye & Contact Lens: Science & Clinical Practice. 33(5):247-252, September 2007.
Schafer, Jeffrey O.D; Mitchell, G Lynn B.S., M.A.S; Chalmers, Robin L. O.D; Long, Bill B.S., M.B.A; Dillehay, Sally O.D., Ed.D; Barr, Joseph O.D., M.S; Bergenske, Peter O.D; Donshik, Peter M.D; Secor, Glenda O.D; Yoakum, John O.D
Abstract:
Purpose. To assess the stability of dryness symptoms after refitting patients wearing low-Dk/t hydrogel contact lenses with high-Dk/t silicone hydrogel contact lenses and to determine whether early dryness symptoms were predictive of discontinuation in the 3-year study.
Conclusions. Dryness symptoms improved after 1 week of refitting with lotrafilcon A and remained stable through 3 years. The presence of dryness after 1 week was associated with discontinuation from contact lens wear. Refitting with silicone hydrogel lenses reduced the frequency and severity of dryness symptoms seen with hydrogel lens wear for many subjects.
(C) 2007 Lippincott Williams & Wilkins, Inc.
The Stability of Dryness Symptoms After Refitting With Silicone Hydrogel Contact Lenses Over 3 Years.
Eye & Contact Lens: Science & Clinical Practice. 33(5):247-252, September 2007.
Schafer, Jeffrey O.D; Mitchell, G Lynn B.S., M.A.S; Chalmers, Robin L. O.D; Long, Bill B.S., M.B.A; Dillehay, Sally O.D., Ed.D; Barr, Joseph O.D., M.S; Bergenske, Peter O.D; Donshik, Peter M.D; Secor, Glenda O.D; Yoakum, John O.D
Abstract:
Purpose. To assess the stability of dryness symptoms after refitting patients wearing low-Dk/t hydrogel contact lenses with high-Dk/t silicone hydrogel contact lenses and to determine whether early dryness symptoms were predictive of discontinuation in the 3-year study.
Conclusions. Dryness symptoms improved after 1 week of refitting with lotrafilcon A and remained stable through 3 years. The presence of dryness after 1 week was associated with discontinuation from contact lens wear. Refitting with silicone hydrogel lenses reduced the frequency and severity of dryness symptoms seen with hydrogel lens wear for many subjects.
(C) 2007 Lippincott Williams & Wilkins, Inc.