Glaucoma, a leading cause of blindness world wide, may be classified into two main types based on the anatomy of the anterior chamber angle: open angle, which is generally a chronic disease and narrow angle glaucoma, which can be an acute medical emergency. An acute primary angle closure glaucoma attack presents with a painful, inflamed eye, cloudy cornea, fixed mid dilated pupil, reduced vision, high intraocular pressure, and possibly nausea and vomiting. If not diagnosed or untreated promptly and appropriately, the attack can result in severe damage and possibly blindness.