This calculator provides an estimate of the IOP that would result in a particular level of risk for developing glaucoma. Please enter values for your patient's age, pattern standard deviation, central corneal thickness, vertical cup-disc ratio, and for your desired risk of conversion to glaucoma in 5 years.
This calculator is based on the combined analyis of the Ocular Hypertension Treatment Study and the European Glaucoma Prevention Study and so application of the results to patients not eligible for those studies should be done with caution.
There are almost certainly unidentified risk factors for the development of glaucoma that are not incorporated in this calculator
Threshold to treat values less than 22 mmHg should be interpreted with caution.
This calculator is not intended for use in patients with known glaucomatous optic nerve damage.
Other calculators are available from the Devers Eye Institute and from the OHTS investigators. The OHTS calculator is based on the combined analysis of the Ocular Hypertension Treatment Study and the European Glaucoma Prevention Study.