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Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments
Published on: April 24, 2020
Incident open-angle glaucoma and intraocular pressure
B Nemesure1, R Honkanen, A Hennis
1Department of Preventive Medicine, Stony Brook University, Stony Brook, New York 11794-8036, USA.
Ophthalmology
|June 23, 2007
Summary
Baseline intraocular pressure (b-IOP) significantly increases open-angle glaucoma (OAG) risk in individuals of African descent. Higher b-IOP levels correlate with greater OAG incidence, though most cases occur at lower pressures.
Area of Science:
- Ophthalmology
- Public Health
- Epidemiology
Background:
- Open-angle glaucoma (OAG) is a leading cause of irreversible blindness worldwide.
- Intraocular pressure (IOP) is a primary modifiable risk factor for OAG.
- Understanding the relationship between baseline IOP (b-IOP) and OAG incidence is crucial for targeted prevention strategies, especially in at-risk populations.
Purpose of the Study:
- To investigate the association between baseline intraocular pressure (b-IOP) and the incidence of open-angle glaucoma (OAG).
- To evaluate b-IOP as a risk factor for incident OAG in a population of African origin.
- To quantify the risk increase associated with different levels of b-IOP.
Main Methods:
- A population-based, 9-year cohort study involving 3,222 participants of African origin.
- Standardized ophthalmic examinations, including applanation tonometry and automated perimetry.
- Cox regression models were used to calculate adjusted relative risks (RRs) and 95% confidence intervals (CIs) for OAG incidence based on b-IOP.
Main Results:
- The 9-year incidence of OAG was 4.4%.
- A 1-mmHg increase in b-IOP was associated with a 12% increase in OAG risk (RR, 1.12).
- Participants with b-IOP >25 mmHg had a 13.1-fold increased risk of OAG (RR, 13.1) compared to those with b-IOP ≤17 mmHg.
Conclusions:
- Baseline intraocular pressure is a significant and positive risk factor for developing open-angle glaucoma.
- While very high b-IOP levels confer a substantially elevated risk, a considerable proportion of OAG cases develop in individuals with lower baseline IOP.
- IOP is an influential risk factor for OAG but has limitations in predicting individual disease development.
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