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Topographic analysis of the corneal posterior face in patients with keratoconus

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Session Details

Session Title: Presented Poster Session: Glaucoma and Imaging

Venue: Poster Village: Pod 3

First Author: : I.Lozano SPAIN

Co Author(s): :    M. Romero Caballero   A. Gomez-Ramirez   F. Rosa        

Abstract Details


Analyze the different topographic patterns of corneal posterior face elevation in patients with keratoconus and assess whether there is a relationship between the topographic pattern and the degree of keratoconus. A retrospective, descriptive and observational study of the morphology of the posterior corneal surface was designed in patients affected with keratoconus, based on their topographic pattern obtained by the Oculus Pentacam® HR corneal topograph.


Hospital General Universitario Reina SofĂ­a, Murcia. Universidad de Murcia. Spain


We included 125 corneal topographies of patients with keratoconus, classifying the degrees of keratoconus between I and IV by the Pentacam HR elevation topograph. The topographies analyzed were classified according to the patterns of elevation of their posterior face in four patterns (according to previous works by Agarwal et al.): Complete positive band, Incomplete positive band, Butterfly wing pattern and Pattern in central island. Later lifting patterns were evaluated as a function of the degree of keratoconus.


The different topographic patterns of corneal posterior elevation of patients diagnosed with keratoconus were classified: Complete Positive Band, 30.4%, Incomplete Positive Band 18.4%, Butterfly Wing 14.4%, Central Island 9.6% and Miscellaneous in 27.2%. In incipient keratoconus (Grades I and II) we observe a high percentage of the topographic pattern in 'Incomplete positive band'. This pattern decreases significantly in the most severe degrees.


In patients with keratoconus the most frequent topographic pattern of corneal posterior elevation is the 'Incomplete Positive Band'. This pattern could be an indicator of incipient keratoconus.

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