Cerebral venous and dural sinus thrombosis—often shortened to CVST or “dural‑sinus clot”—is a rare, potentially life‑threatening kind of stroke that happens inside the brain’s low‑pressure drainage ...
“Diplopia” simply means double vision—seeing two separate copies of one real object. Most people automatically think about eye‑muscle problems when they hear that term, because misaligned eyes ...
Cerebral polyopia—sometimes called cerebral diplopia—is a rare neurological vision disorder in which the brain, not the eyes, creates two or many “ghost” copies of a single object. The extra images ...
Central Toxic Keratopathy (CTK) is a rare, self‑limiting condition in which the very center of the cornea turns cloudy, thins, and flattens after refractive or other eye surgery. The opacification is ...
Central Serous Chorioretinopathy—often shortened to CSCR or just “central serous”—is an eye disease in which clear fluid leaks out of the small blood vessels that lie underneath the retina, the ...
Central Retinal Vein Occlusion means that the single large vein that drains blood out of the retina – the light‑sensitive “film” at the back of your eye – has become partly or completely blocked. ...
Central neurocytoma (CN) is a rare, slow‑growing brain tumour that starts from immature nerve‑like cells (neurons) inside the fluid‑filled cavities of the brain called the lateral ventricles, usually ...
Your fovea is the tiny, bowl-shaped pit in the very center of the macula—the macula being the central patch of retina that lets you read, drive, and recognize faces. At the foveal floor, a special ...
Central Cloudy Dystrophy of François is a very rare stromal corneal dystrophy first described in 1955. In this condition, the central part of each cornea develops a mosaic of cloudy‑gray, ...
Central Areolar Choroidal Dystrophy is a rare, inherited eye condition that slowly erodes the very heart of your central retina (the macula). In CACD, the supporting layer under the retina—the ...
Cavernous Sinus Syndrome (CSS) is a collection of signs and symptoms that appear when the structures running through, or lying next to, the cavernous sinus become damaged or compressed. The cavernous ...
A cataract is any cloudiness or opacity inside the eye’s natural lens. In children the condition is especially serious because the developing brain relies on clear images to “learn” how to see. When ...
Cat Scratch Disease (often nick‑named “cat‑scratch fever”) is an infection caused by the bacterium Bartonella henselae. People usually catch it when a kitten or adult cat scratches, bites, or even ...
A caruncular dermoid cyst is a small, benign (non‑cancerous) pocket of tissue that grows in the lacrimal caruncle—the tiny pink nodule you see at the inner corner of each eye. Dermoid cysts are ...
Transient Perivascular Inflammation of the Carotid Artery—usually shortened to TIPIC syndrome—is a short‑lived but intensely painful swelling around one side of the carotid artery where it forks in ...
Carotidynia—sometimes called Fay’s syndrome or TIPIC syndrome (Transient Perivascular Inflammation of the Carotid artery)—is an uncommon cause of one‑sided neck and face pain. The ache sits right ...
A carotid cavernous fistula (CCF) is an abnormal “shortcut” channel that opens between one of the main arteries carrying blood to the brain—the internal or external carotid artery—and a large venous ...
Capsular Bag Distension Syndrome, also called capsular block syndrome, is a rare but important complication that can appear after cataract surgery when an artificial lens (intra‑ocular lens or IOL) ...
CAPOS syndrome is a very rare, inherited neurological condition first described in 1996 and traced to a single spelling mistake (missense variant Glu818Lys and a few close cousins) in the ATP1A3 ...
Capillary hemangioma—often called an infantile hemangioma, strawberry birth‑mark, or benign vascular tumor—is the most common tumor of infancy. Although it looks alarming, this cluster of extra ...
