Optic neuritis means inflammation of the optic nerve, the “cable” that carries pictures from your eye to your brain. When this nerve gets inflamed, vision ...

Optic nerve sheath meningioma is a slow-growing, usually benign (non-cancerous) tumor that starts in the thin lining (the meninges) that wraps around the optic ...

Optic nerve sheath decompression is a delicate eye-orbit surgery that a specialist eye surgeon performs to protect vision when pressure inside the head is ...

Optic nerve hypoplasia (ONH) is a birth difference of the eye–brain connection. The optic nerve is the “cable” that carries visual signals from the eye to the ...

Optic Nerve Head Drusen (ONHD) are tiny, rock-like (often calcified) deposits that sit inside the optic nerve head (the “disc” you see at the back of the eye). ...

Optic nerve head avulsion means the optic nerve fibers are torn away from the back of the eye right at the optic nerve head (the “optic disc,” the round, pink ...

An optic nerve glioma is a tumor that grows from the support cells of the optic pathway, which is the “wire” that carries visual signals from the eye to the ...

The optic nerve is the “cable” that carries visual signals from your eye to your brain. In some babies, a part of the tissue near the optic nerve does not ...

An optic disc melanocytoma (ODM) is a small, very dark brown or black growth made of pigment cells (melanocytes) that sits on the optic disc (the “entrance” of ...

An optic disc hemorrhage is a small spot of bleeding on or next to the optic disc. The optic disc is the place in the back of the eye where the optic nerve ...

Optic disc drusen are tiny, hard, pebble-like deposits that sit inside the “head” of the optic nerve where it enters the back of the eye (the optic disc). They ...

Optic atrophy means the optic nerve is damaged and has lost healthy fibers, so the nerve cannot carry visual messages from the eye to the brain as well as it ...

Opsoclonus-Myoclonus Syndrome (OMS)—also called opsoclonus-myoclonus-ataxia syndrome (OMAS) or Kinsbourne syndrome. Opsoclonus-Myoclonus Syndrome (OMS) is a ...

Recurrent Painful Ophthalmoplegic Neuropathy (RPON) is a rare condition in which a person has two or more attacks of a unilateral (one-sided) headache together ...

Ophthalmomyiasis means fly larvae (maggots) invade the eye or the tissues around the eye. It is uncommon, but it can harm vision if it is not treated quickly. ...

Rift Valley fever (RVF) is a viral disease that mainly affects animals (like sheep, goats, cattle, camels, and buffalo) but can also infect people. It is ...