what causes the optic nerve in the eyes to hurt
Glaucoma is a group of diseases that damage the eyeâs optic nerve and can result in vision loss and blindness. However, with early detection and treatment, you can often protect your eyes against serious vision loss. The optic nerve is a bundle of more than 1 million nerve fibers. It connects the retina to the brain. (See diagram above.) The retina is the light-sensitive tissue at the back of the eye. A healthy optic nerve is necessary for good vision.
Things to remember. 1  Optic neuritis is inflammation of the optic nerve that causes blurred, grey and dim vision. 2  If you have these symptoms, contact your doctor immediately.  Common causes of optic neuritis include multiple sclerosis, cytomegalovirus, Lyme disease and herpes.