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Dietary omega 3 fatty acids decrease intraocular pressure with age by increasing aqueous outflow.

Christine T O Nguyen1, Bang V Bui, Andrew J Sinclair

  • 1Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia.

Investigative Ophthalmology & Visual Science
|January 26, 2007
PubMed
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Dietary omega-3 fatty acids can lower intraocular pressure (IOP) in aging rats by improving aqueous outflow. This suggests omega-3s may be a modifiable factor for IOP regulation and potentially glaucoma risk.

Area of Science:

  • Ophthalmology
  • Nutrition Science
  • Animal Models

Background:

  • Intraocular pressure (IOP) is a critical factor in ocular health.
  • Dietary fatty acids, particularly omega-3s, play a role in physiological processes.
  • Understanding the link between diet, aging, and IOP is essential for preventative strategies.

Purpose of the Study:

  • To investigate the association between dietary omega-3 (omega-3) fatty acid intake and age-related intraocular pressure (IOP).
  • To determine if altered aqueous humor outflow is a mechanism linking omega-3 intake and IOP.

Main Methods:

  • Rats were fed omega-3 sufficient or deficient diets from conception.
  • Intraocular pressure was measured across a lifespan (5-40 weeks).
  • Aqueous outflow and ciliary body fatty acid composition were analyzed.

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Main Results:

  • Omega-3 sufficient diets led to a significant decrease in IOP by 40 weeks (13%).
  • This reduction in IOP correlated with a 56% increase in aqueous outflow facility.
  • Increased docosahexaenoic acid was observed in the ciliary body of omega-3 fed rats.

Conclusions:

  • Dietary omega-3 supplementation can reduce age-related IOP by enhancing aqueous outflow.
  • Docosanoids, derived from omega-3s, are likely mediators of this effect.
  • Dietary modification represents a potential avenue for IOP regulation and glaucoma risk management.