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.
Angle-closure glaucoma, sometimes called narrow-angle glaucoma, occurs when the drainage angle of the eye becomes completely blocked. This results in a sudden rise of dangerously high pressure. This is a much more rare form of glaucoma, but can cause blindness in the affected eye if not treated promptly. What Are the Symptoms of Glaucoma? Open-angle glaucoma: There are usually no warning signs or symptoms for