Wernicke Encephalopathy (WE) is a sudden brain disorder caused by a lack of vitamin B1 (thiamine). Thiamine is a small nutrient your body cannot store in large ...

Weill-Marchesani Syndrome (WMS) is a rare, inherited connective-tissue condition that affects the eyes, the skeleton (bones and joints), and sometimes the ...

Wallenberg syndrome happens when the side (lateral) part of the medulla—a small but vital area at the bottom of the brainstem—loses its blood supply, most ...

Waldenström Macroglobulinemia (WM) is a rare cancer of B-cells (a type of white blood cell). These cancer cells live mainly in the bone marrow and make a very ...

Waldenström macroglobulinemia is a rare type of slow-growing blood cancer. It starts in B-lymphocytes (a type of white blood cell) inside the bone marrow. ...

Wagner syndrome is a rare, inherited eye condition that mainly affects the vitreous (the clear gel that fills the eye) and the retina (the light-sensitive ...

A Vossius ring is a round, brown-black circle that appears on the front surface of the eye’s natural lens (the anterior lens capsule) after blunt trauma to the ...

A vortex vein varix is a localized, balloon-like widening of a vortex vein, which is one of the large choroidal drainage veins inside the eye. The choroid is ...

Von Hippel–Lindau (VHL) syndrome is an inherited condition that raises the lifetime risk of developing multiple tumors and cysts in different organs. These ...

Vogt’s striae are very fine, straight, vertical lines that an eye doctor can see inside the clear front window of your eye (the cornea) when you have ...

Vogt–Koyanagi–Harada (VKH) disease is an autoimmune condition. “Autoimmune” means the body’s defense system gets confused and attacks its own cells. In VKH, ...

Vitreous Wick Syndrome is a problem that happens when strands of the eye’s vitreous (the clear, gel-like substance that fills the back of the eye) slip forward ...

Vitreous metastasis means cancer cells that started somewhere else in the body have traveled through the bloodstream and reached the vitreous (the clear gel ...

Vitreous hemorrhage means bleeding into the vitreous, the clear gel that fills most of the inside of the eye between the lens at the front and the retina at ...

A vitreous cyst is a small, round or oval sac filled with fluid that floats inside the vitreous (the clear gel that fills the back of your eye). Think of it ...

Vitreopapillary Traction Syndrome is a condition where the vitreous—the clear gel that fills the back of the eye—pulls abnormally on the optic nerve head, also ...

Vitreomacular Traction Syndrome means the clear gel that fills the eye—the vitreous—is pulling on the macula, which is the sharp-seeing center of the retina. ...

Visual vertigo / visually-induced dizziness means you feel dizzy, off-balance, or motion-sick mainly when your eyes see a lot of motion or busy patterns. Your ...

Visual Variant of Alzheimer’s Disease is a form of Alzheimer’s that mainly damages the back parts of the brain (the occipital, parietal, and occipito-temporal ...

Visual symptoms of Parkinson’s disease are problems with how the eyes move, how comfortable the eyes feel, and how the brain handles visual information. They ...