Water Flow Conductivity and Pore Diameter in Extended-Wear Gel Lens Materials
- 1 January 1978
- journal article
- Published by Wolters Kluwer Health in Optometry and Vision Science
- Vol. 55 (1) , 43-47
- https://doi.org/10.1097/00006324-197801000-00006
Abstract
The water flow conductivity of 3 high-water-content (70 to 85%) gel materials proposed for extended-wear contact lenses was measured. Pore diameter was calculated from these flow conductivities. High-water-content gels were found to have pore diameters in the range of 20 to 30 A compared with about 8 A for the lower-water-content HEMA gel. The larger pore diameter of extended-wear lenses will permit entry of drugs, hormones, and enzymes and thereby may pose new problems for wearers.Keywords
This publication has 0 references indexed in Scilit: