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    Ocular Hypertension Treatment Study (OHTS) Calculator

    Identifies patients that may benefit from therapy to lower intraocular pressure (IOP).
    When to Use
    Pearls/Pitfalls
    Why Use

    Use in an outpatient setting in patients 30-80 years old with ocular hypertension to assess need for initial treatment to reduce the likelihood of progression to glaucoma.

    • The original studies used patients with a baseline intraocular pressure (IOP) of 22 to 32 mmHg.

    • Not validated in patients under 30 years of age or over 80 years of age.

    • Primarily developed from studies looking at the early development of primary open angle glaucoma (POAG) and has little utility in later stages of glaucoma.

    • Patients with potential secondary causes of elevated IOP including pigment dispersion or pseudoexfoliation should be excluded, as well as patients with non-glaucomatous reasons for visual field loss.

    • There are other established risk factors for the development of POAG, and these should be taken into account separately.

    Aids in shared decision making with patients regarding whether to initiate treatment for ocular hypertension based on the five-year risk of progression to open angle glaucoma.

    30-44
    0
    45-54
    +1
    55-64
    +2
    65-74
    +3
    ≥75
    +4
    <22
    0
    22 to <24
    +1
    24 to <26
    +2
    26 to <28
    +3
    ≥28
    +4
    >600
    0
    576–600
    +1
    551–575
    +2
    526–550
    +3
    ≤525
    +4
    <0.3
    0
    0.3 to <0.4
    +1
    0.4 to <0.5
    +2
    0.5 to <0.6
    +3
    ≥0.6
    +4
    <1.8
    0
    1.8 to <2.0
    +1
    2.0 to <2.4
    +2
    2.4 to <2.8
    +3
    ≥2.8
    +4

    Result:

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    Next Steps
    Evidence
    Creator Insights
    Dr. Michael A. Kass

    About the Creator

    Michael A. Kass, MD, is a professor of ophthalmology and chairman of the Department of Ophthalmology and Visual Sciences at Washington University in St. Louis. He is also the director of the Heed Ophthalmic Foundation. Dr. Kass’ primary research is focused on glaucoma, ocular hypertension, and esotropia.

    To view Dr. Michael A. Kass's publications, visit PubMed

    Are you Dr. Michael A. Kass? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
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