Abstract
Daily disposable contact lenses are gaining in popularity among practitioners and wearers for the improved ocular health and subjective outcomes they offer. Recently a novel daily disposable contact lens material with water gradient technology was introduced. Delefilcon A lenses consist of a 33% water content silicone hydrogel core and an outer hydrogel layer which is totally free of silicone and contains 80% water.
The aim of the present study was to confirm the layered structure of delefilcon A contact lenses. Thickness of hydrogel coating on the silicone hydrogel core was assessed using Raman spectroscopy. To investigate the layered structure of the material, depth spectra of the lenses were recorded.
The results obtained suggest that at about 6 μm a boundary between the hydrogel layer and silicone hydrogel core exists, which is in good agreement with the manufacturer’s data.
Data collected in this experiment confirm a water gradient at the delefilcon A lens surface.
J Appl Biomater Funct Mater 2017; 15(2): e149 - e152
Article Type: ORIGINAL RESEARCH ARTICLE
DOI:10.5301/jabfm.5000329
Authors
Katarzyna Krysztofiak, Kamila Ciężar, Mikołaj KościńskiArticle History
- • Accepted on 09/09/2016
- • Available online on 27/10/2016
- • Published online on 26/04/2017
Disclosures
This article is available as full text PDF.
Authors
- Krysztofiak, Katarzyna [PubMed] [Google Scholar] 1, 2, * Corresponding Author ([email protected])
- Ciężar, Kamila [PubMed] [Google Scholar] 1, 2
- Kościński, Mikołaj [PubMed] [Google Scholar] 1, 2
Affiliations
-
Department of Physics, Adam Mickiewicz University, Poznań - Poland -
NanoBioMedical Centre, Adam Mickiewicz University, Poznań - Poland
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