title: Tear-film dynamics and oxygen tension under a circular contact lens.
abstract: The cornea requires a minimum level of oxygenation; this may be prevented by a contact lens, and corneal swelling and other undesirable effects may result. By employing thin-film lubrication theory, this study derives analytical solutions for tear-film velocity components and pressure under a circular contact lens. Oxygen-tension contours are then obtained for various values of squeeze action and parallel motion of the lens.
mesh_terms: D003261:Contact Lenses; D005143:Eyelids / Q000502:physiology; D006801:Humans; D008433:Mathematics; D009038:Motion; D010100:Oxygen; D013500:Surface Tension; D013666:Tears
chemical_list: D010100:Oxygen