Screening subclinical keratoconus with Placido-based corneal indices
Identificadores
URI: http://hdl.handle.net/10835/5671
ISSN: 1040-5488
DOI: http://dx.doi.org/10.1097/OPX.0b013e3182843f2a
ISSN: 1040-5488
DOI: http://dx.doi.org/10.1097/OPX.0b013e3182843f2a
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Ramos López, DaríoFecha
2013Resumen
Purpose:
To assess in a sample of normal, keratoconic and keratoconus suspect eyes the
performance of a set of new topographic indices computed directly from the digitized
images of the Placido rings.
Methods:
This comparative study comprised a total of 124 eyes of 106 patients from the
ophthalmic clinics Vissum Alicante and Vissum Almería (Spain), in three groups:
control group (50 eyes), keratoconus group (50 eyes) and keratoconus suspect group (24
eyes). In all cases, a comprehensive examination was performed including the corneal
topography with a Placido-based CSO topography system. Clinical outcomes were
compared among groups, along with the discriminating performance of the proposed
irregularity indices.
Results:
Significant differences at level 0.05 were found on the values of the indices among
groups by means of Mann-Witney-Wilcoxon non-parametric test and Fisher’s exact test.
Additional statistical methods, such as receiver operating characteristic analysis...