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  • Washington University

    The following 2 calculators estimate the 5-year risk that a person with ocular hypertension will develop primary open-angle glaucoma (POAG). The data used to generate these calculations are based on results from the Ocular Hypertension Treatment study (OHTS) and the European Glaucoma Prevention study (EGPS), and were originally published by the Washington University School of Medicine in St. Louis.

    Directions for Use

    The calculators require the following patient information:

    • Age
    • Vertical cup/disc ratio by contour
    • IOP measurements
    • Central corneal thickness using an ultrasound pachymeter
    • Pattern standard deviation using any of the following Humphrey full threshold 30-2 or 24-2, SITA standard 30-2 or 24-2, or loss variance from Octopus 32-2


    Two methods can be used to estimate the 5-year risk of developing POAG: A continuous method based on actual data and a simplified point system. Please read the limitations and cautions listed below.

    • Make sure to review the limitations and guidelines in the information tab within each calculator.
    • The predictions derived using these methods are designed to aid but not to replace clinical judgment.

    Continous Method Calculator  | Enter actual patient data and eye measurements.

    Points Method Calculator  | Select the range for the patient age and average of multiple measurements.

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