Orbital chloroma is a solid tumor made of immature white blood cells (myeloid blasts) that grows inside the eye socket (the orbit). Doctors also call it ...

Orbital cellulitis is a serious infection that happens behind the eye, inside the bony eye socket called the orbit. The orbit is a tight space filled with eye ...

A cavernous hemangioma (also called a cavernous venous malformation in many body parts, and a cerebral cavernous malformation when it is in the brain or ...

An orbital cavernous venous malformation is a benign (non-cancerous) blood-vessel problem inside the bony eye socket (the orbit). It is made of smooth, ...

Orbital aspergillosis is a fungal infection around or inside the eye socket. The eye socket is also called the orbit. The orbit has the eyeball, the optic ...

Orbital Apex Syndrome is a problem that happens in a very tight space at the very back of the eye socket, called the orbital apex. This small area is like a ...

Orbital adipose tissue disease” isn’t a formal diagnosis. It’s a descriptive way to say “the fat inside the eye socket is part of the disease.” In real-world ...

Orbital actinomycosis is a long-standing bacterial infection that grows in and around the eye socket (the orbit). The orbit is the bony cup that holds the ...

The ora serrata is the serrated junction where the retina (the light-sensitive tissue at the back of the eye) transitions into the ciliary body. It marks the ...

Optociliary shunt vessels are special “detour” blood vessels that appear on the surface of the optic disc, which is the round, pink area where the optic nerve ...

An optic disc pit is a small, round or oval congenital hole or pocket in the optic nerve head. The optic nerve head is the spot where the nerve exits the eye. ...

An optic pit is a tiny, oval or round depression (a small “dimple”) on the surface of the optic nerve head—the place where the nerve exits the back of the eye. ...

Optic perineuritis (often shortened to OPN) is an inflammation that sits around the optic nerve, not inside the nerve itself. The optic nerve is the cable that ...

Craniofacial fibrous dysplasia is a bone problem that happens in the skull and face. In this condition, normal hard bone is slowly replaced by soft, rubbery, ...

McCune-Albright syndrome (MAS), some people develop fibrous dysplasia (FD) in the skull and face bones. FD is a bone problem where normal bone is replaced by ...

Optic neuropathy means there is damage or disease affecting the optic nerve, the cable that carries visual signals from the eye to the brain. When the optic ...