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. Author manuscript; available in PMC: 2007 Dec 1.
Published in final edited form as: Exp Eye Res. 2006 Oct 6;83(6):1515–1520. doi: 10.1016/j.exer.2006.08.008

Figure 2.

Figure 2

Effect of calculation method on the outflow facility value. Outflow was measured by 2-level constant pressure (15/25 mmHg) perfusion in 2 eyes (Eye X and Eye Y; one each from 2 monkeys). A. The change in flow rate (ΔF) for Eye X is less than for Eye Y even though the flow rates (F1 and F2) at the each of the two pressures (P1 and P2, respectively) are greater for Eye X than for Eye Y. B. Consequently, outflow facility (C) calculated by the two-level method (CA = (F2-F1)/(P2-P1)) is less for Eye X compared to Eye Y. However, C calculated by the one-level method (CB1=F1/[P1-P0] or CB2=F2/[P2-P0]) is greater than CA for Eye X and less than CA for Eye Y. Data, obtained from Eye X or Eye Y, are mean±s.e.m. (μl/min/mmHg for C or μl/min for F) from four to five values collected during a 36-min perfusion of each eye (not including the equilibrium intervals).