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ā£Specific conditions:ā£ ā£ Age relatedā£ ā Atrophy of both iris stroma and pigment epithelial layer occurs as a natural aging processā£ ā Bilateral, symmetric iris stromal atrophy.ā£ ā Normal pupillary contour with increased prominence of the pigment epithelium andā£ the pupillary sphincter- tan ringsā£ ā£ Viral Uveitisā£ ā Chronic inflammation can lead to characteristic iris stromal atrophyā£ ā VZV generally produces sector iris atrophy due to a vascularā£ occlusive vasculitis, whereas HSV usually produces patchy iris atrophyā£ ā£ Essential iris atrophyā£ ā ICE syndrome, unilateralā£ ā Primary defect is believed to be a cellular membrane secreted by the abnormal endothelial cells which covers the iris and the drainage angle of the eye- contraction leads to pupillary changes and formation of PAS - angle closure glaucomaā£ ā Displaced or distorted pupil, patchy areas of iris atrophy and holes in iris.ā£ ā£ Traumaā£ Post cataract surgery due to trauma to iris can lead to iris atrophy after many years.ā£ ā£ Pigment Dispersion Syndromeā£ ā Pigment granules settle on iris surfaceā£ ā Posterior bowing of mid peripheral irisā£ ā Classic mid peripheral,radial slit like transillumination defects in iris bestā£ seen on retroillumination.ā£ ā£ PXF syndromeā£ ā Particulate pigment deposition on sphincter and peripheral irisā£ ā Moth-eaten transillumination defects occur at the sphincterā£ ā£ Post acute congestive glaucomaā£ ā Partial/total absence of pupillary ruffā£ ā Sphincter atrophyā£ ā Whorling of the iris radial patternā£ ā Sectoral iris atrophyā£ ā£ Fuchās Uveitisā£ ā Diffuse atrophy of stroma and posterior pigment epithelium of iris.ā£ ā Determines the quality of heterochromia iridis.ā£ ā£ Albinismā£ ā Tyrosinase-negative: Lack of melaninā£ ā Iris is diaphanous and translucent giving rise to a āpink-eyed appearanceāā£ ā Tyrosinase-positive: synthesise variable amounts of melanin.ā£ ā Iris may be blue or dark-brown, variable translucencyā£ ā£ Axenfeld Rieger Syndromeā£ ā Iris strands adherent to the posterior embryotoxon can range from fine threadlike strands to broad bands of iris tissue.ā£ ā Stroma - generalized atrophy with corectopia, ectropion uveae
www.ophthalmobytes.com Image from Rajan Eye Care Hospital #ophthalmology #ophthal #doctor #health #medical #vision #education #optometry #medicalstudent #optometrist #medicine #eye #ophtho #ophthalmologist #ophthalmo #med #medicaleducation #ophthalmologyresident #ophthalmologyresidency #iris #irisatrophy #atrophy #herpesuveitis #herpeszoster #herpessimplex Causes from entokey.com
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