Ocular perfusion pressure and glaucoma risk

I am posting this from the Fiteyes google group.

Lita wrote,

(I am posting an exerpt to link because medscape requires a login)

 http://cme.medscape.com/viewarticle/587626:

Are there vascular risk factors for glaucoma, such as vascular disease, hypertension, vasospasm, and ocular perfusion pressure (OPP, the difference between systolic, diastolic, or mean arterial blood pressure and ocular pressure)?