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Does aqueous humor secretion decrease with age?
M Diestelhorst1, G K Kriegistein
1University Eye Hospital, Cologne, Germany.
International Ophthalmology
|September 1, 1992
Summary
Aqueous humor flow significantly decreases with age, but this reduction is minimal (approximately 2.5% per decade) and not clinically significant, even for glaucoma surgery patients.
Area of Science:
- Ophthalmology
- Physiology
Background:
- Aqueous humor dynamics are crucial for maintaining intraocular pressure.
- Age-related changes in ocular physiology may affect aqueous humor production.
Purpose of the Study:
- To quantify and compare daytime aqueous humor flow in healthy young adults and older patients.
- To determine if age significantly impacts aqueous humor secretion rates.
Main Methods:
- Utilized the Fluorotron Master II anterior chamber protocol to measure aqueous humor flow.
- Included 148 healthy volunteers and 75 older patients with no history of ocular pathology.
- Excluded participants with systemic conditions or ocular trauma.
Main Results:
- Healthy volunteers (mean age 26.5 years) showed higher aqueous humor flow (OD: 2.26 ± 1.0 µL/min, OS: 2.17 ± 1.0 µL/min) compared to older patients (mean age 65.5 years, OD: 1.91 ± 1.1 µL/min).
- Statistical analysis (Mann-Whitney-U-test) confirmed a significant difference in aqueous humor flow between the age groups (p < 0.01).
- The decrease in flow was approximately 2.5% per decade.
Conclusions:
- Aqueous humor secretion significantly decreases with advancing age.
- This age-related decrease in aqueous humor flow is minimal and unlikely to be clinically relevant.
- The findings suggest that age-related changes in aqueous humor dynamics do not necessitate adjustments in glaucoma management or surgery considerations.