Posters

Correlation of higher order aberrations in anterior corneal surface and degree of keratoconus measured by Scheimpflug camera

Poster Details

First Author: S.Delgado MEXICO

Co Author(s):    J. Velazco   N. Ruiz Quintero                 

Abstract Details

Purpose:

To determine the correlation of High Order aberrations in Anterior corneal surface and degree of Keratoconus Measured by Scheimplug camera.

Setting:

Asociación para Evitar la Ceguera en México, Department of Cornea, DF, México.

Methods:

We conducted a descriptive, transversal and retrospective study in 152 eyes of patients with keratoconus from January 2009 to April 2014. We investigated the corneal aberrometry in the anterior corneal surface and used topographic mapping (by Muckenheim Amsler classification) to determine the degree of keratoconus. We investigated the corneal aberrometry in the anterior corneal surface and used topographic mapping (by Muckenheim Amsler classification) to determine the degree of keratoconus. Statistical analysis was done with SPSS v.15; the Kendall ́s tau was used to find the correlation of high order aberrations in the anterior corneal surface and the degree of keratoconus.

Results:

Coma aberration was significantly correlated with keratoconus severity (r=0.61). Trifoil and keratoconus were weakly correlated (r=0.34). Keratoconus severity was also weakly inversely correlated with spherical aberration in horizontal (r=­-0.28) and vertical was (r=­-0.24). Finally, keratoconus severity had a strong inverse correlation with ectasia type (r=-­0.70)

Conclusions:

Higher order aberrations of the anterior corneal surface, but not the entire optical system, positively correlates with the severity of keratoconus.

Financial Disclosure:

NONE