Optic neuritis is an inflammation of the optic nerve, the bundle of nerve fibers that transmits visual information from your eye to your brain. Pain and temporary vision loss are common symptoms of optic neuritis.
Optic neuritis is highly associated with multiple sclerosis, a disease that causes inflammation and damage to nerves in your brain and spinal cord. In some people, signs and symptoms of optic neuritis may be the first indication of multiple sclerosis.
Most people who have a single episode of optic neuritis eventually recover their vision.
Causes- The exact cause of optic neuritis is unknown. However, optic neuritis is believed to develop when the immune system mistakenly targets the substance covering your optic nerve (myelin), resulting in inflammation and damage to the myelin.
Normally, the myelin helps electrical impulses travel quickly from the eye to the brain, where they're converted into visual information. Optic neuritis disrupts this process, affecting vision.
The following autoimmune conditions often are associated with optic neuritis:
Multiple sclerosis. Multiple sclerosis is a disease in which your autoimmune system attacks the myelin sheath covering nerve fibers in your brain and spinal cord. In people with optic neuritis, the risk of developing multiple sclerosis following one episode of optic neuritis is about 50 percent over a lifetime.
Your risk of developing multiple sclerosis after optical neuritis increases further if an MRI scan shows lesions on your brain.
Neuromyelitis optica. In this condition, inflammation occurs in the optic nerve and spinal cord. Neuromyelitis optica has similarities to multiple sclerosis, but neuromyelitis optica doesn't cause damage to the nerves in the brain as often as multiple sclerosis does. Optic neuritis arising from neuromyelitis optica tends to be more severe than optic neuritis associated with multiple sclerosis.
Other autoimmune conditions, such as sarcoidosis and systemic lupus erythematosus, have also been associated with optic neuritis.
Other factors that have been linked to the development of optic neuritis include:
Infections. Bacterial infections, including Lyme disease, cat-scratch fever and syphilis, or viruses such as measles, mumps and herpes can cause optic neuritis.
Drugs. Some drugs have been associated with the development of optic neuritis. One of these drugs is ethambutol (Myambutol), which is used to treat tuberculosis
Symptoms-- Optic neuritis usually affects one eye. Symptoms might include:
Pain. Most people who develop optic neuritis experience eye pain that's worsened by eye movement. Sometimes the pain feels like a dull ache behind the eye.
Vision loss. Most people experience at least some temporary reduction in vision, but the extent of vision loss varies. Noticeable vision loss usually develops over hours or days. Exercise or a hot bath or shower may exaggerate the vision loss. Vision loss is permanent in some cases.
Loss of color vision. Optic neuritis often affects color perception. You might notice that colors appear less vivid than normal.
Flashing lights. Some people with optic neuritis report seeing flashing or flickering lights.

APIS MELLIFICA 30 – Optic neuritis in the first stage. Sudden piercing pains. Pain around orbits. Burning stinging pain.+
BELLADONNA 30—Severe throbbing headache with flushed face. Better by cold application or by keeping the head high
MERCURIUS SOL 30- Those who work in foundries. With burning pain. Eyes draw together. Periodical loss of vision. Blak spots, flames , sparks before the eyes
PHOSPHORUS 200- Atrophy of the optic nerve with cataract . Green halo about the candle light. Sensation as if everything were covered with a mist or veil or something pulled tightly over eyes.

PULSATILLA 30- Neuralgic pain in eyeballs, while walking, worse right side. Profuse lachrymation with dull pains in eyeballs extending to malar bone

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