Open AccessKeratoconus associated with CSNB1
Author(s) -
Dan Q Nguyen,
C Hemmerdinger,
Richard Hagan,
M. W. Brown,
Say Aun Quah,
Stephen B. Kaye
Publication year - 2009
Publication title -
bmj case reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.231
H-Index - 26
ISSN - 1757-790X
DOI - 10.1136/bcr.09.2008.0877
Subject(s) - keratoconus , medicine , ophthalmology , astigmatism , corneal topography , ectasia , cornea , erg , optometry , surgery , retinal , optics , physics
A 35-year-old man with best corrected visual acuities of -18.00/+10.00×180 (6/60) OD and -10.00/+8.00×5 (6/36) OS. Bilateral steep central corneal thinning, paracentral ectasia and Vogts striae were present; normal fundi. Corneal topography disclosed 7.4 dioptres of irregular astigmatism in the central 3 mm with thinning (335 μm). Electroretinography (ERG) showed no response. There were no medical or environmental influences for his keratoconus. Occurrence of keratoconus and CSNB in the patient may represent a chance association, but keratoconus has not been previously linked with CSNB1 either as a chance or true association though both show genetic predisposition.