Glaucoma is primarily referred to as a silent thief of sight, as most of its types typically exhibit no symptoms, no pain until noticeable vision loss occurs. It is a group of related eye disorders which occurs mainly due to damage to the optic nerve which carries information from the eye to the brain. In most cases, associated with ocular hypertension, a condition when the pressure inside the eye is higher than normal pressure but sometimes it can occur when the intraocular pressure is normal.