Research measures water flow conductivity in gel lens materials, suggesting implications for drug delivery.
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.
No takes yet. Share an insight, caveat, or question.
Irving Fatt (1978) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: