Hi, @caracasfrases. Good article indeed. By the way, there is a condition called normotensive glaucoma which entails a glaucomatic event with a normal intraocular pressure (below 21 mmHg).
p/s: Open-angle and angle-closure glaucoma are not characteristic but classification or type of glaucoma.
Yes, it's a pretty complete post where I wanted to make everything understood about this disorder.