A older (70s) relative of mine suffered acute glaucoma recently and got treated immediately. She then got another attack a week later and had to go to the hospital.

This is a definition I got from a webiste (http://www.glaucoma.org.au/whatis.htm)

"Glaucoma is the name given to a group of eye diseases in which the optic nerve at the back of the eye is slowly destroyed. In most people this damage is due to an increased pressure inside the eye - a result of blockage of the circulation of aqueous, or its drainage. In other patients the damage may be caused by poor blood supply to the vital optic nerve fibers, a weakness in the structure of the nerve, and/or a problem in the health of the nerve fibers themselves."

I'm concerned why this would happen twice in a week with our relative. Does anyone have any advice as to what caused this? Thank you!