期刊
CURRENT EYE RESEARCH
卷 40, 期 3, 页码 267-273出版社
TAYLOR & FRANCIS INC
DOI: 10.3109/02713683.2014.917192
关键词
Betaine; contact lens; controlled release; dexpanthenol; ocular discomfort; vitamin E
资金
- National Science Foundation (CBET CMMI) [1129932]
- Directorate For Engineering [1129932] Funding Source: National Science Foundation
Purpose: To develop a contact lens system that will control the release of an osmoprotectant and a moisturizing agent with the aim to reduce symptoms of ocular dryness. Materials and methods: Profiles of the release of osmoprotectant betaine and moisturizing agent dexpanthenol from senofilcon A and narafilcon B contact lenses were determined in vitro under sink conditions. Both types of lenses were also infused with vitamin E to increase the duration of drug release due to the formation of the vitamin E diffusion barriers in the lenses. The release profiles from vitamin E-infused lenses were compared with those from the control lenses. Results: Both dexpanthenol and betaine are released from commercial silicone hydrogel lenses for only about 10 min. Vitamin E loadings into contact lenses at about 20-23% can increase the release times to about 10 h, which is about 60 times larger compared to the control unmodified lenses. Conclusions: Vitamin E-loaded silicone hydrogel contact lenses released betaine and dexpanthenol in a controlled fashion.
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