Multiple evanescent white dot syndrome
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Multiple evanescent white dot syndrome (MEWDS) is an uncommon inflammatory condition of the retina that typically affects otherwise healthy young females in the second to fourth decades of life.
Patients present with acute unilateral decreased vision, photopsias and central or paracentral scotoma. An antecedent viral prodrome occurs in approximately one-third of cases. Myopia is commonly seen in patients.
Eye exam during the acute phase of the disease reveals multiple discrete white to orange spots at the level of the RPE or deep retina, typically in a perifoveal location (around the fovea).
- Visual field abnormalities are variable and include generalized depression of visual field, paracentral or peripheral scotoma and enlargement of the blind spot.
- Fluorescein angiography of the eye reveals characteristic punctate hyperfluorescent lesions in a wreath-like configuration surrounding the fovea.
- Indocyanine green angiography reveals hypofluorescent lesions in a greater number compared with other studies.
- Fundus autofluorescence (FAF) has been shown to be a noninvasive method to demonstrate the subretinal spots in MEWDS.
MEWDS is a self limited disease with excellent visual recovery within 2-10 weeks. However residual symptoms including photopsia may persist for months.
- Basic and Clinical Science Course; Intraocular inflammation and uveitis (2011-2012 ed.). American Academy of Ophthalmology. 2012. ISBN 978-1615251162.
- Basic and Clinical Science Course; Retina and vitreous (2011-2012 ed.). American Academy of Ophthalmology. 2012. ISBN 978-1615251193.
- Myron, Yanoff (2008). Ophthalmology (3rd ed.). Mosby. ISBN 978-0323057516.