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Intraocular pressure (IOP) and pulsatile ocular blood flow (POBF) are negatively correlated (Figure 1). (Pearson Correlation: r = -0.642, df = 18, P = 0.002)

Intraocular pressure and pulsatile blood flow to the eyeball scatter graph
Figure 1. Intraocular pressure and pulsatile blood flow to the eyeball.
(Source: Pinakin, G (2002) The influence of corneal dimensions on measurements related to glaucoma and ocular hypertension. PhD thesis, Anglia Polytechnic University.)