tonography

[tō-nŏgrə-fē]
n.
  1. Continuous measurement of intraocular pressure to determine the facility of aqueous outflow, used to determine the presence of glaucoma.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.