Tonography helps you to determine:: (A) The rate of formation of aqueous, (B) The facility of outflow of aqueous, (C) The levels of intraocular pressure at different times., (D) None of the above
Answer is B. Tonography is a noninvasive technique for determining the facility of aqueous outflow. Ref: Parson's Diseases of The Eye, 18th Edition, Page 7226