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DefinitionA 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...
DefinitionA 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...
DefinitionWagner 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 layer...
DefinitionWaldenström 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. These B-cells...
DefinitionWaldenström 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...
DefinitionWallenberg 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 often...
DefinitionWeill-Marchesani Syndrome (WMS) is a rare, inherited connective-tissue condition that affects the eyes, the skeleton (bones and joints), and sometimes the heart. In everyday terms, people...
DefinitionWernicke 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...
DefinitionA Wessely Immune Ring is a thin, gray-white ring that appears inside the clear part of the eye (the cornea). The ring sits within the corneal...
DefinitionWest African Crystalline Maculopathy is an eye condition where tiny, shiny, yellow-green crystals collect in the very center of the retina (the fovea, the part that...
DefinitionWest African Crystalline Retinopathy is a rare eye condition seen mostly in people of West African origin. Doctors see tiny, shiny, yellow-green “crystals” clustered at the...
