Ocular Perfusion Pressure (OPP)
Mean, systolic and diastolic ocular perfusion pressure from blood pressure and intraocular pressure; a low mean OPP is a glaucoma-risk marker.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Systolic BP
- 120 mmHg
- Diastolic BP
- 80 mmHg
- Intraocular pressure
- 15 mmHg
Result: Mean OPP 47.2 mmHg (systolic 105, diastolic 65) — low.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Framing
- A low mean OPP (≈ below 50 mmHg) is one of several vascular associations with glaucoma risk; it is not by itself diagnostic.
What you enter
- Systolic BP
- Diastolic BP
- Intraocular pressure
How this is calculated
- Formula
- MAP = DBP + ⅓·(SBP − DBP); mean OPP = ⅔·MAP − IOP; systolic OPP = SBP − IOP; diastolic OPP = DBP − IOP.
Costa VP, Harris A, Anderson D, et al. Ocular perfusion pressure in glaucoma. Acta Ophthalmol. 2014;92(4):e252-266. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.