Caffeine and intraocular pressure in a Nigerian population

Area of Science:

• Ophthalmology
• Pharmacology
• Public Health

Background:

• Caffeine is a widely consumed stimulant in sub-Saharan Africa, often through kola nuts and various products.
• Understanding the physiological effects of caffeine, particularly on ocular health, is crucial given its prevalence.

Purpose of the Study:

• To investigate the acute impact of caffeine ingestion on intraocular pressure (IOP) in healthy Nigerian volunteers.
• To assess the correlation between caffeine consumption and changes in blood pressure.

Main Methods:

• A controlled study involving two groups: experimental (caffeinated coffee) and control (decaffeinated coffee).
• Intraocular pressure and blood pressure were measured at baseline and at 30, 60, and 90 minutes post-ingestion.

Main Results:

• Caffeine ingestion led to a statistically significant increase in intraocular pressure, averaging nearly 4 mm Hg.
• The elevation in IOP was sustained for several minutes and showed a monotonic rise with time.
• A corresponding increase in systolic and diastolic blood pressure was observed in the caffeinated group, unlike the control group.

Conclusions:

• Caffeine consumption can acutely elevate intraocular pressure, suggesting potential risks for individuals with or at risk of glaucoma.
• The findings highlight the importance of increased glaucoma screenings and patient education in Nigerian populations due to endemic caffeine use.
• Further research into long-term effects and specific population risks associated with caffeine consumption is warranted.