Joanna Furgała, Stanisława Szarska, Jerzy Detyna
THE INFLUENCE OF ADHESION ON THE STATE OF THE SURFACE LAYER OF CONTACT LENSES
Several research focuses on assessing the properties of contact lenses, due to the increasing number of users, whose needs grow because of the conditions in which they work (work at the computer room air-conditioned). The main aspect of providing comfortable wearing contact lenses is their good wettability. Studies on wettability are evolving all the time because of the difficulties to be faced, e.g. incomplete blinking. Hence the search for closest to the natural conditions of the test method,which reflects the reaction of the cornea-contact lens-tear film.
In order to understand the mechanism of interaction between different elements of the system discussed, there need to refer to the fundamental rights of the interactions at the interface between different phases.
Adhesion of a liquid to a solid phase is a physicochemical process, which involves tying up each of these two phases as a result of intermolecular interactions. Wettability of the test body depends on the surface tension of the liquid present in the system, and the hydrophilicity of the surface. However, mostly used to determine the wettability, is contact angle measurement.
The main purpose of this study was to investigate various soft contact lens care solution adhesion to the surface of different types of contact lenses. In addition to standard contact angle measurements using goniometer,a modified method for hydrophilicity measurement of contact lenses, was applied.