1.
J Cataract Refract Surg
; 31(3): 636-9, 2005 Mar.
Artigo
em Inglês
| MEDLINE
| ID: mdl-15811759
RESUMO
We used an Orbscan II topography system (Bausch & Lomb) to study anterior and posterior surface abnormalities, keratometry, and topographic pachymetry in a patient with circumscribed posterior keratoconus. This system clearly showed a marked localized paracentral annular elevation in the posterior corneal surface that corresponded to an abrupt decrease in thickness and a slightly localized anterior surface bulge in the anterior float.