Unbound MEDLINE

Detection of subclinical keratoconus using an automated decision tree classification.

Abstract

PURPOSE
To develop a method for automatizing the detection of subclinical keratoconus based on a tree classification.
DESIGN
Retrospective case-control study.
METHODS
setting: University Hospital of Bordeaux. participants: A total of 372 eyes of 197 patients were enrolled: 177 normal eyes of 95 subjects, 47 eyes of 47 patients with forme fruste keratoconus, and 148 eyes of 102 patients with keratoconus. observation procedure: All eyes were imaged with a dual Scheimpflug analyzer. Fifty-five parameters derived from anterior and posterior corneal measurements were analyzed for each eye and a machine learning algorithm, the classification and regression tree, was used to classify the eyes into the 3 above-mentioned conditions. main outcome measures: The performance of the machine learning algorithm for classifying eye conditions was evaluated, and the curvature, elevation, pachymetric, and wavefront parameters were analyzed in each group and compared.
RESULTS
The discriminating rules generated with the automated decision tree classifier allowed for discrimination between normal and keratoconus with 100% sensitivity and 99.5% specificity, and between normal and forme fruste keratoconus with 93.6% sensitivity and 97.2% specificity. The algorithm selected as the most discriminant variables parameters related to posterior surface asymmetry and thickness spatial distribution.
CONCLUSION
The machine learning classifier showed very good performance for discriminating between normal corneas and forme fruste keratoconus and provided a tool that is closer to an automated medical reasoning. This might help in the surgical decision before refractive surgery by providing a good sensitivity in detecting ectasia-susceptible corneas.

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  • Publisher Full Text
  • Authors

    Smadja D, Touboul D, Cohen A, Doveh E, Santhiago MR, Mello GR, Krueger RR, Colin J

    Institution

    University Center Hospital of Bordeaux, Anterior Segment and Refractive Surgery Unit, Bordeaux, France. davidsmadj@hotmail.fr

    Source

    American journal of ophthalmology 156:2 2013 Aug pg 237-246.e1

    MeSH

    Algorithms
    Artificial Intelligence
    Case-Control Studies
    Corneal Topography
    Decision Support Techniques
    Decision Trees
    Humans
    Keratoconus
    Retrospective Studies
    Sensitivity and Specificity

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    23746611