Effect of cold air on aqueous humor dynamics in humans.
Several parameters of aqueous humor dynamics were measured in 11 human subjects before and after exposure of one eye to a continuous stream of cold air. In the treated eye, I.O.P. was found to decrease significantly from a mean +/- SD pre-treatment value of 14.1 +/- 2.3 mmHg to a post-treatment value of 12.6 +/- 2.6 mmHg. Episcleral venous pressure was found to decrease significantly from a pre-treatment value of 6.2 +/- 1.3 mm Hg. No significant changes were found in aqueous flow or total outflow facility, indicating that cold air exposure decreased I.O.P. by causing a decrease in episcleral venous pressure.
Ortiz
G J
GJ
Cornell University Medical College, New York, New York.
Cook
D J
DJ
Yablonski
M E
ME
Masonson
H
H
Harmon
G
G
D000388:Air; D001082:Aqueous Humor / Q000502:physiology*; D001831:Body Temperature; D003080:Cold Temperature; D006801:Humans; D007429:Intraocular Pressure; D012590:Sclera / Q000098:blood supply; D013997:Time Factors; D014690:Venous Pressure