MDCalc

Ocular Hypertension Treatment Study (OHTS) Calculator

Identifies patients that may benefit from therapy to lower intraocular pressure (IOP).

Age, years

Mean intraocular pressure, mmHg
Mean of three measurements per eye
Mean central corneal thickness, µm
Mean of three measurements per eye
Mean vertical cup-to-disc ratio by contour
Mean pattern standard deviation, dB
2 measurements per eye of: Humphrey full threshold 30-2, SITA Standard 30-2 or 24-2, or loss of variance from Octopus 32-2

Result:

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Advice

  • Patients with a score between 0-6 can be observed every 6 months.

  • Patients with a score between 7-12 should be counseled about the risks and benefits of starting treatment versus close observation.

  • Patients with a score >12 should strongly consider initiating treatment.

Management

  • Initiation of IOP lowering therapy.

  • Close monitoring with visual field and optic nerve head imaging every 3-12 months, depending on specific patient parameters.