Open-angle glaucoma and diabetes: the Blue Mountains eye study, Australia

Area of Science:

• Ophthalmology
• Endocrinology
• Public Health

Background:

• Diabetes mellitus is a systemic disease with known microvascular complications.
• Open-angle glaucoma is a leading cause of irreversible blindness worldwide.
• The relationship between diabetes and glaucoma requires further investigation in diverse populations.

Purpose of the Study:

• To investigate the association between diabetes and open-angle glaucoma.
• To determine if diabetes influences the prevalence of ocular hypertension.
• To examine this relationship in an older Australian cohort.

Main Methods:

• A population-based study of 3,654 individuals aged 49-96 years.
• Ophthalmic examinations included automated perimetry, optic disc imaging, and applanation tonometry.
• Fasting plasma glucose levels were measured; diabetes and ocular hypertension were diagnosed using established criteria.

Main Results:

• Glaucoma prevalence was higher in individuals with diabetes (5.5%) compared to those without (2.8%).
• Ocular hypertension was also more common in people with diabetes (6.7% vs. 3.5%).
• Diabetes was present in 13.0% of glaucoma patients, and intraocular pressure was slightly higher in diabetic individuals.

Conclusions:

• A significant association exists between diabetes and open-angle glaucoma.
• This link appears independent of diabetes' effects on intraocular pressure.
• The findings suggest a direct relationship between diabetes and glaucoma pathogenesis.