Glaucoma is a the term used for a group of conditions that ultimately result in damage to the optic nerve. One of the main causative factors in the majority of the types of glaucoma is an elevation in the intraocular pressure.

This is the pressure inside your eye and normal intraocular pressure ranges from 10 mmHg to 21 mmHg. This can lead to permanent optic nerve damage and irreversible impairment in vision.