Ocular Perfusion Pressure in Subjects Without Ocular Disease

Abstract

Objective: To describe the behavior of ocular perfusion pressure in subjects without ocular disease.

Methods: A cross-sectional descriptive study was performed with subjects without ocular disease from the Ophthalmology outpatient clinic of the University Hospital "General Calixto García", between January and December 2019.

Results: The median intraocular pressure of the right eye ranged between 13.0-16.0 mmHg, and of the left eye between 13.0-15.5 mmHg, throughout the study. The maximum value for both eyes was obtained at 6:00 a. m. (early morning). The median systolic blood pressure ranged from 129.0-138.5 mmHg, and diastolic from 79.5-81.5 mmHg. The minimum diastolic blood pressure value was 53 mmHg at 6:00 a.m. The median ocular perfusion pressure of the right eye ranged from 46.4 mmHg (12:00 a.m.) to 50.8 mmHg; and of the left eye from 47.3 mmHg (6:00 a.m.) to 51.9 mmHg. The minimum specific ocular perfusion pressure value was 35 mmHg for both eyes, at 6:00 a.m.

Conclusions: Arterial hypertension is the most frequent personal pathologic antecedent in the population studied, and both elevated and decreased out-of-normal figures capable of affecting ocular perfusion pressure, especially low diastolic, occasionally occur. However, ocular perfusion pressures remained normal, probably due to individual autoregulatory mechanisms.