primitive When we talk about primitive man, we're usually talking about cavemen and other people who existed before the advent of table manners, but if your uncle speaks grunts and chews with his mouth open, you could describe him as primitive too.
1 Optic neuritis is an inflammation of the optic nerve, often affecting young adults in one eye. 2  Optic neuritis is frequently associated with multiple sclerosis. 3  Other causes include infections, autoimmune disease, and injury to the optic nerve. The symptoms of optic neuritis include vision loss, reduced color vision, and pain on movement of the eye with recovery over weeks to a month, in most cases. 2  The diagnosis is made on the basis of the patient history and an examination by an ophthalmologist.
Summary of  Glaucoma and optic nerve repair.. Glaucoma is a leading cause of irreversible blindness worldwide and causes progressive visual impairment attributable to the dysfunction and death of retinal ganglion cells (RGCs).amage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.