Biomaterial Database

Tear-film dynamics and oxygen tension under a circular contact lens. 1977

P E Allaire, and S W Allison, and A M Gooray

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.

UI	MeSH Term	Description	Entries
D008433	Mathematics	The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Mathematic
D009038	Motion	Physical motion, i.e., a change in position of a body or subject as a result of an external force. It is distinguished from MOVEMENT, a process resulting from biological activity.	Motions
D010100	Oxygen	An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.	Dioxygen,Oxygen-16,Oxygen 16
D003261	Contact Lenses	Lenses designed to be worn on the front surface of the eyeball. (UMDNS, 1999)	Lenses, Contact,Contact Lens,Lens, Contact
D005143	Eyelids	Each of the upper and lower folds of SKIN which cover the EYE when closed.	Eyelid
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013500	Surface Tension	The force acting on the surface of a liquid, tending to minimize the area of the surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Interfacial Force,Interfacial Tension,Surface Tensions,Tension, Surface,Tensions, Surface
D013666	Tears	The fluid secreted by the lacrimal glands. This fluid moistens the CONJUNCTIVA and CORNEA.	Meibomian Lipids,Meibum,Lipid, Meibomian,Meibomian Lipid,Tear