The lateral sulcus separates the frontal lobe from the temporal lobe. The frontal lobe can be divided into a lateral, polar, orbital (above the orbit; also called basal or ventral), and medial part. Each of these parts consists of a particular gyrus: 1  Lateral part: lateral part of the superior frontal gyrus, middle frontal gyrus, inferior frontal gyrus. 2  Polar part: Transverse frontopolar gyri, frontomarginal gyrus. 3  Orbital part: Lateral orbital gyrus, anterior orbital gyrus, posterior orbital gyrus, medial orbital gyrus, gyrus rectus.
Less common causes of glaucoma include a blunt or chemical injury to the eye, severe eye infection, blockage of blood vessels in the eye, inflammatory conditions of the eye, and occasionally eye surgery to correct another condition.
Without initial treatment, glaucoma can cause permanent blindness. The good news is, while glaucoma canât be cured, early treatment can control it. What is glaucoma? Glaucoma is a disease of the optic nerve, which carries vision from the eye to the brain, caused by pressure inside the eye which is high enough to harm nerve fibers and damage vision. As many as three million Americans have glaucoma, and many people who have glaucoma don't notice any symptoms until they start to lose some of their eyesight.