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Hypertension, perfusion pressure, and primary open-angle glaucoma. A population-based assessment
J M Tielsch1, J Katz, A Sommer
1Dana Center for Preventive Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Md.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|February 1, 1995
Summary
Vascular factors like blood pressure are linked to primary open-angle glaucoma (POAG). Lower ocular perfusion pressure significantly increases POAG risk, especially in older individuals, suggesting blood flow regulation issues.
Area of Science:
- Ophthalmology
- Vascular Biology
- Public Health
Background:
- Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness.
- Understanding the etiological factors, particularly vascular contributions, is crucial for prevention and treatment.
Purpose of the Study:
- To investigate the association between vascular factors and the prevalence of primary open-angle glaucoma (POAG).
- To explore how age modifies the relationship between blood pressure and POAG.
Main Methods:
- Population-based prevalence survey conducted in East Baltimore, Maryland.
- Stratified cluster sampling of 5308 residents aged 40 years and older.
- POAG diagnosis based on glaucomatous optic nerve damage and visual field defects, excluding intraocular pressure as a diagnostic criterion.
Main Results:
- Modest positive associations were observed between systolic and diastolic blood pressure and POAG.
- The association between blood pressure and POAG was stronger in older participants.
- Significantly increased POAG prevalence (sixfold excess) was noted in individuals with the lowest perfusion pressure.
Conclusions:
- POAG is associated with alterations in ocular blood flow regulation.
- Evidence suggests a breakdown in the autoregulation of ocular blood supply in POAG patients.