(Central retinal vein occlusion)
A central retinal vein occlusion is a blockage of retinal central vein by a thrombus. It causes painless, mild to severe vision loss and occurs suddenly in general. The diagnosis is made by fundoscopy. Treatments anti vascular vessel growth factor medications include (z. B. ranibizumab, pegaptanib, bevacizumab), intraocular injection of dexamethasone implant or triamcinolone and laser photocoagulation.
A central retinal vein occlusion is a blockage of retinal central vein by a thrombus. It causes painless, mild to severe vision loss and occurs suddenly in general. The diagnosis is made by fundoscopy. Treatments anti vascular vessel growth factor medications include (z. B. ranibizumab, pegaptanib, bevacizumab), intraocular injection of dexamethasone implant or triamcinolone and laser photocoagulation. Etiology The major risk factors include hypertension age Other risk factors include diabetes glaucoma Increased blood viscosity occlusion can also be idiopathic. A retinal vein occlusion is rare in young people. The occlusion can affect a branch retinal vein or central retinal vein. Neovascularization (abnormal neovascularization) of the retina or iris (diabetic retinopathy) occurs in about 16% of all patients with retinal Zentralvenenokklusion and can lead to secondary (neovascular) glaucoma, which can occur weeks to months after the occlusion. A vitreous hemorrhage may be caused by retinal neovascularization. Symptoms and signs A painless vision loss usually occurs suddenly, but can also gradually over a period of days or weeks to occur. Funduscopy shows bleeding on the retina, swollen (expanded) and tortuous retinal veins, and usually a significant retinal edema. These changes are diffuse usually if the obstruction affects the retinal central vein, and limited to a quadrant if the obstruction affects only one branch of the retinal central vein. Central retinal vein occlusion Image courtesy of A. Viestenz, Eye Clinic of the University Hospital Erlangen-Nuremberg via the Online Journal of Ophthalmology (www.onjoph.com). var model = {thumbnailUrl: ‘/-/media/manual/professional/images/central_retinal_vein_occlusion_high_de.jpg?la=de&thn=0&mw=350’ imageUrl: ‘/-/media/manual/professional/images/central_retinal_vein_occlusion_high_de.jpg?la = en & thn = 0 ‘, title:’ Retinal central vein occlusion ‘, description:’ u003Ca id = “v37894303 ” class = “”anchor “” u003e u003c / a u003e u003cdiv class = “”para “” u003e u003cp u003eBei a central retinal vein occlusion appear the retinal veins enlarged and tortuous. The fundus appears jammed and edematous. Numerous retinal hemorrhages are also characteristic u003c / p u003e u003c / div u003e ‘credits’. Image courtesy of A. Viestenz