Physical properties and interaction with the ocular surface of water-gradient contact lenses
Affiliation
University of Milano Bicocca; University of Birmingham; Sandwell and West Birmingham NHS Trust; Aston UniversityPublication date
2023-02-22Subject
Ophthalmology
Metadata
Show full item recordAbstract
Since the introduction of silicone hydrogel contact lenses, many silicone-hydrogel materials have been produced, including water-gradient contact lenses with a silicone hydrogel core and a thin hydrogel outer layer (e.g., delefilcon A, verofilcon A, and lehfilcon A). Their properties have been investigated in various studies assessing both the chemical-physical characteristics and the comfort, but the overall picture is not always consistent. In this study, water-gradient technology is reviewed by looking at basic physical properties both in vitro and in vivo and at the interaction with the human ocular surface. Surface and bulk dehydration, surface wetting and dewetting, shear stress, interaction with tear components and with other environmental compounds, and comfort are discussed.Citation
Ponzini E, Recchioni A, Cheloni R, Zeri F, Tavazzi S. Physical Properties and Interaction With the Ocular Surface of Water-Gradient Contact Lenses. Eye Contact Lens. 2023 Apr 1;49(4):152-159. doi: 10.1097/ICL.0000000000000974Type
ArticlePMID
36811833Journal
Eye & Contact LensPublisher
Lippincott, Williams & Wilkinsae974a485f413a2113503eed53cd6c53
10.1097/ICL.0000000000000974