ArticleClinical optometry2026
In vitro Sorption of Lysozyme in Reusable Silicone Hydrogel Contact Lenses: The Impact of Material and Care Solution.
Article in Clinical optometry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Purpose: To characterize lysozyme sorption and denaturation in two SiHy lens materials (comfilcon A and Lotrafilcon B), and compare the effects of three lens care systems - one based on the disinfectant povidone-iodine that contains the protease subtilisin, one based on hydrogen peroxide, and one multipurpose solution - on their ability to remove lysozyme from these lens materials, via established methods. Methods: Test lenses were exposed to an artificial tear solution to simulate in vitro deposition. Lysozyme sorption and denaturation were quantified using high-performance liquid chromatography and a Results: Comfilcon A sorbed 1.01 ± 0.16 µg of lysozyme after one day of simulated wear in vitro, with 87 ± 17% of that penetrating the lens bulk. Lotrafilcon B similarly sorbed 0.94 ± 0.19 µg after one cycle, although nearly 100% was retained at the lens surface. All three contact lens care systems removed a significant proportion of lysozyme from comfilcon A (p <0.05). The PVP-I-based solution removed significantly more lysozyme from Lotrafilcon B than the other two systems (p < 0.01). Conclusion: Lysozyme deposition remains a persistent issue with reusable silicone hydrogel contact lenses. Differential lens properties may affect its sorption, denaturation, and the cleaning efficacy of different lens care systems. These preliminary data suggest that enzymatic removal of protein with a PVP-I-based system may contribute to more consistent outcomes for reusable SiHy lens wearers.
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