Synchysis scintillans is a rare eye condition where tiny cholesterol crystals float inside the jelly of the eye. The eye jelly is called the vitreous. When ...

Sympathetic ophthalmia is a rare eye disease. It happens when one eye is injured or operated on, and the body’s immune system later starts attacking both eyes. ...

Symmetrical Drug-Related Intertriginous and Flexural Exanthema (SDRIFE)—sometimes called “drug-induced baboon syndrome”. SDRIFE is a specific kind of drug ...

Symblepharon means the inner skin of the eyelid sticks to the white surface of the eye. The inner skin of the eyelid is called the palpebral conjunctiva. The ...

Acute febrile neutrophilic dermatosis is a skin disease. Doctors also call it Sweet syndrome. “Acute” means it starts suddenly. “Febrile” means it comes with ...

Sweet syndrome is a skin disease in which the body’s immune system suddenly sends many neutrophils, which are a type of white blood cell, into the skin. These ...

Lockwood’s Ligament–Related Disorder (LLRD) means the eye’s natural “hammock” support under the eyeball and the nearby lower-eyelid support tissues have become ...

Zonular disease means a problem with the tiny fibers that hold the natural lens of the eye in place. These fibers are called lens zonules or the suspensory ...

The suspensory ligament of the eye is a ring of very fine fibers that hold the clear natural lens in the middle of the eye. These fibers are called zonules ...

Surgically-Induced Necrotizing Scleritis, or SINS, is a very severe inflammation that eats away the white wall of the eye called the sclera, and it happens ...

Suprachoroidal hemorrhage is bleeding that happens inside the eye in a very specific space. The eye wall has several layers. One layer is the sclera, which is ...

The suprachoroidal space is a potential space between the choroid and the sclera. When fluid or blood collects here, the choroid lifts away from the sclera. ...

The superior transverse scapular ligament (STSL) is a small, flat band of tissue at the top of the shoulder blade (scapula). It stretches over a natural notch ...

Superior Segmental Optic Nerve Hypoplasia (SSONH)—sometimes nicknamed the “topless optic disc”—is a congenital (present at birth) optic nerve anomaly in which ...

Superior Orbital Fissure Syndrome, or SOFS, is a group of nerve and vein problems that happen in a narrow tunnel behind the eye called the superior orbital ...

Superior ophthalmic vein thrombosis is a clot in a main vein that drains blood from the eye into the cavernous sinus inside the skull. It is uncommon, serious, ...

A cavernous sinus–dural fistula (often called an “indirect” carotid-cavernous fistula) is an abnormal shortcut between small artery branches in the skull base ...

“Superior Ophthalmic Vein Cannulation Fistulas” isn’t the name of a disease. It mixes a treatment approach (“superior ophthalmic vein cannulation,” which is a ...

Superior Oblique Myokymia is a rare condition where one eye’s superior oblique muscle twitches in very small, very fast bursts. People feel brief spells of ...

Superior Limbic Keratoconjunctivitis—often shortened to SLK—is a long-lasting, on-and-off eye surface problem that mainly irritates the upper part of the eye ...