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Keratoconus-like Topographic Changes in Keratoconjunctivitis Sicca

 

作者: Cintia de Paiva,   Lindsey Harris,   Stephen Pflugfelder,  

 

期刊: Cornea  (OVID Available online 2003)
卷期: Volume 22, issue 1  

页码: 22-24

 

ISSN:0277-3740

 

年代: 2003

 

出版商: OVID

 

关键词: Keratitis sicca;Keratoconus;Corneal topography

 

数据来源: OVID

 

摘要:

Purpose.To describe a case of inferior corneal steepening with a keratoconus-like pattern in a patient with nocturnal lagophthalmos and aqueous tear deficiency (ATD).Methods.Axial curvature mapping was performed with the Tomey TMS-2N videokeratoscopy instrument. Keratoconus-like topography patterns were identified with the Klyce Software package of this instrument.Results.Axial videokeratoscopy showed asymmetric inferior corneal steepening in the right eye. The surface regularity index (SRI), surface asymmetry index (SAI), and the simulated keratometric cylinder change (CYL) were 1.05, 5.05, and 0.75, respectively. The keratoconus screening indices were as follows for the right eye: Klyce/Maeda index of 95% similarity (clinical keratoconus interpreted) and Smolek/Klyce index of 23.09% severity (keratoconus suspect interpreted). Ultrasound pachymetric mapping showed a normal central corneal thickness. We found a similar topographic pattern of keratoconus in seven eyes of 74 dry eye patients who were previously evaluated with the Tomey TMS-2N.Conclusion.Chronic ocular desiccation and aqueous tear deficiency can produce inferior corneal steepening and high astigmatism resembling keratoconus.

 

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