CENTRAL RETINAL VEIN OCCLUSION (ISCHEMIC in the first picture, NON-ISCHEMIC in the second picture) ā£
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CRVO occurs due to the occlusion of the central retinal vein at or posterior to the lamina cribrosa. It causes painless unilateral loss of vision. ā£
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Pathogenesis : VIRCHOWāS TRIAD : Vessel damage, Stasis and Hypercoagulability. ā£
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The central retinal vein and artery share a common adventitial sheath at arteriovenous crossings posterior to the lamina cribrosa. Ā Atheroscleortic changes of the artery may compress the vein and cause CRVO. ā£
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Some risk factors include diabetes, hypertension, hyperlipidemia, raised intraocular pressure, hypercoagulable states etc. ā£
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It is important to distinguish between ISCHEMIC vs NON-ISCHEMIC CRVO
Image from Rajan Eye Care HospitalĀ
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