title: Bilateral circumscribed posterior keratoconus: visualization by ultrasound biomicroscopy and slit-scanning topography analysis.
abstract: This paper documents a rare nonprogressive developmental disorder-bilateral circumscribed posterior keratoconus-in a 60-year-old man referred for a cataract surgery. For the first time ultrasound biomicroscopy was used to visualise the local anterior bulging of the posterior corneal surface with concomitant thinning of the stroma. The amount of localized posterior depression, corneal thickness and the refractive power of both the posterior and anterior corneal curvature were measured using slit-scanning topography analysis (Orbscan).
authors.affiliation: Department of Ophthalmology, Medical University of Lublin, 20-059 Lublin, Poland.
authors.forename: Robert
authors.initials: R
authors.lastname: Rejdak
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Nowomiejska
authors.forename: Dariusz
authors.initials: D
authors.lastname: Haszcz
authors.forename: Anselm G M
authors.initials: AG
authors.lastname: Jünemann