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Aqueous humor dynamics in experimental iridocyclitis
Investigative Ophthalmology & Visual Science
|March 1, 1987
Summary
Bovine serum albumin (BSA) induced ocular inflammation in monkeys significantly reduced intraocular pressure by decreasing aqueous humor flow and increasing uveoscleral outflow, leading to ocular hypotony.
Area of Science:
- Ophthalmology
- Ocular Physiology
Background:
- Ocular inflammation can alter intraocular pressure (IOP).
- Understanding the mechanisms behind inflammation-induced IOP changes is crucial for managing ocular conditions.
Purpose of the Study:
- To investigate the effects of induced ocular inflammation on aqueous humor dynamics and IOP in a primate model.
- To elucidate the specific changes in aqueous flow and uveoscleral outflow during inflammation.
Main Methods:
- Ocular inflammation was induced via intravitreal bovine serum albumin (BSA) injection in cynomolgus monkeys.
- Intraocular pressure, aqueous flow, and uveoscleral outflow were measured using standard physiological techniques and fluorescein isothiocyanate (FITC) dextran 70.
- Fluorescence microscopy was used to examine ocular tissues.
Main Results:
- BSA-induced inflammation led to a significant decrease in IOP compared to saline-injected control eyes.
- Aqueous humor flow was reduced by more than half in inflamed eyes.
- Uveoscleral outflow facility increased fourfold in inflamed eyes, with evidence of ciliary body edema and suprachoroidal space fluorescence.
Conclusions:
- BSA-induced ocular inflammation causes ocular hypotony through a dual mechanism: reduced aqueous humor production and enhanced uveoscleral outflow.
- These findings highlight the complex interplay between inflammation and aqueous humor dynamics in the eye.