{"title":"圆锥角膜晕征1例。","authors":"Hui He, Lijun Qu","doi":"10.1186/s12886-025-04400-5","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>There are several clinical signs that may contribute to the diagnosis of keratoconus. Their appearance is associated with the evolution of keratoconus. In this case, the formation of a halo on the iris in a patient with stage IV keratoconus was reported. This halo sigh is a novel one and has not been reported earlier.</p><p><strong>Case presentation: </strong>A 30-year-old woman presented to the ophthalmology clinic with one year history of vision deterioration to finger counting in her left eye. A diagnosis of keratoconus was made due to the inferior-central corneal steepening and thinning. When the slit-lamp light projects onto the cone, a halo forms on the iris and shifts its shape and location as the irradiation angle changes.</p><p><strong>Conclusion: </strong>A halo sign was observed on the iris of a patient with stage IV keratoconus (Amsler-Krumeich classification) when the slit-lamp beam was projected onto the corneal cone.</p>","PeriodicalId":9058,"journal":{"name":"BMC Ophthalmology","volume":"25 1","pages":"548"},"PeriodicalIF":1.7000,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12502615/pdf/","citationCount":"0","resultStr":"{\"title\":\"Halo sign in keratoconus: a case report.\",\"authors\":\"Hui He, Lijun Qu\",\"doi\":\"10.1186/s12886-025-04400-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>There are several clinical signs that may contribute to the diagnosis of keratoconus. Their appearance is associated with the evolution of keratoconus. In this case, the formation of a halo on the iris in a patient with stage IV keratoconus was reported. This halo sigh is a novel one and has not been reported earlier.</p><p><strong>Case presentation: </strong>A 30-year-old woman presented to the ophthalmology clinic with one year history of vision deterioration to finger counting in her left eye. A diagnosis of keratoconus was made due to the inferior-central corneal steepening and thinning. When the slit-lamp light projects onto the cone, a halo forms on the iris and shifts its shape and location as the irradiation angle changes.</p><p><strong>Conclusion: </strong>A halo sign was observed on the iris of a patient with stage IV keratoconus (Amsler-Krumeich classification) when the slit-lamp beam was projected onto the corneal cone.</p>\",\"PeriodicalId\":9058,\"journal\":{\"name\":\"BMC Ophthalmology\",\"volume\":\"25 1\",\"pages\":\"548\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-10-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12502615/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"BMC Ophthalmology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1186/s12886-025-04400-5\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"OPHTHALMOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"BMC Ophthalmology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1186/s12886-025-04400-5","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
Background: There are several clinical signs that may contribute to the diagnosis of keratoconus. Their appearance is associated with the evolution of keratoconus. In this case, the formation of a halo on the iris in a patient with stage IV keratoconus was reported. This halo sigh is a novel one and has not been reported earlier.
Case presentation: A 30-year-old woman presented to the ophthalmology clinic with one year history of vision deterioration to finger counting in her left eye. A diagnosis of keratoconus was made due to the inferior-central corneal steepening and thinning. When the slit-lamp light projects onto the cone, a halo forms on the iris and shifts its shape and location as the irradiation angle changes.
Conclusion: A halo sign was observed on the iris of a patient with stage IV keratoconus (Amsler-Krumeich classification) when the slit-lamp beam was projected onto the corneal cone.
期刊介绍：
BMC Ophthalmology is an open access, peer-reviewed journal that considers articles on all aspects of the prevention, diagnosis and management of eye disorders, as well as related molecular genetics, pathophysiology, and epidemiology.
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