{"title":"双侧限定后圆锥角膜。","authors":"D Q Chan","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Posterior keratoconus is a rare corneal disorder characterized by a diffuse or localized protrusion of the posterior corneal surface into a thinning stroma. It is believed to be a congenital, nonprogressive condition.</p><p><strong>Case report: </strong>A case of bilateral circumscribed posterior keratoconus is presented. Diagnostic ocular signs include localized protrusion of the posterior corneal surface, normal anterior corneal surface, stromal thinning, and endothelial changes. However, anterior corneal contour reveals progressive steepening in this case.</p><p><strong>Conclusion: </strong>Posterior keratoconus is an unusual corneal anomaly with subtle clinical features. Recognition of these signs is essential in the diagnostic and management processes.</p>","PeriodicalId":17208,"journal":{"name":"Journal of the American Optometric Association","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Bilateral circumscribed posterior keratoconus.\",\"authors\":\"D Q Chan\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Posterior keratoconus is a rare corneal disorder characterized by a diffuse or localized protrusion of the posterior corneal surface into a thinning stroma. It is believed to be a congenital, nonprogressive condition.</p><p><strong>Case report: </strong>A case of bilateral circumscribed posterior keratoconus is presented. Diagnostic ocular signs include localized protrusion of the posterior corneal surface, normal anterior corneal surface, stromal thinning, and endothelial changes. However, anterior corneal contour reveals progressive steepening in this case.</p><p><strong>Conclusion: </strong>Posterior keratoconus is an unusual corneal anomaly with subtle clinical features. Recognition of these signs is essential in the diagnostic and management processes.</p>\",\"PeriodicalId\":17208,\"journal\":{\"name\":\"Journal of the American Optometric Association\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the American Optometric Association\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Optometric Association","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Background: Posterior keratoconus is a rare corneal disorder characterized by a diffuse or localized protrusion of the posterior corneal surface into a thinning stroma. It is believed to be a congenital, nonprogressive condition.
Case report: A case of bilateral circumscribed posterior keratoconus is presented. Diagnostic ocular signs include localized protrusion of the posterior corneal surface, normal anterior corneal surface, stromal thinning, and endothelial changes. However, anterior corneal contour reveals progressive steepening in this case.
Conclusion: Posterior keratoconus is an unusual corneal anomaly with subtle clinical features. Recognition of these signs is essential in the diagnostic and management processes.
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