Contact lenses are complex materials that must provide a range of physical properties in order to be effective, safe and comfortable to wear. EAG Laboratories has extensive experience in the analysis and characterization of contact and intraocular lens products. Contact and intraocular lens products have critical surface chemistry characteristics to ensure comfort and performance. We have extensive experience in surface and polymer characterization to help contract and intraocular lens manufacturers.
These properties include: (1) high oxygen permeability in order to transmit O2 to the cornea, (2) hydrophilic surface so that a continuous tear film coats the lens providing lubrication and (3) resistance to bacterial and protein adsorption.
Understanding both the surface and bulk chemistry of lenses is critical to engineering optimal performance. The combination of surface sensitivity (0-5 nm sampling depth), standardless quantification and ability to detect not only elements but also functional groups make XPS (X-ray Photoelectron Spectroscopy) a powerful analytical tool for determining the near-surface chemistry of these materials.