What affect do low physical activity, TV watching and ethnicity have on vision?

Adults aged 45 to 84 were evaluated in the population-based, cross-sectional Multi-Ethnic Study of Atherosclerosis where retinal vascular calibers were measured. Those in the lowest two quartiles of intentional physical activity had a wider retinal venular caliber compared to those in the highest quartile of intentional physical activity except blacks. Similarly, those in the highest quartile of television viewing time had a wider venular caliber compared to those in the lowest quartile. This difference remained significant in whites only.

The results of this study are being presented this week at the 2010 Annual Meeting of the Association for Research in Vision and Ophthalmology.

As reported in the abstract, “Results show an association of lack of physical activity and greater TV viewing time with wider retinal venules independent of other cardiovascular risk factors.” The research team also suggested that longitudinal studies be conducted to confirm these associations and further explore ethnic differences.

Researchers from the University of Western Ontario encapsulated water-soluable proteins that aid with wound healing and blood vessel regeneration into porous nanoparticles. The nanoparticles were then incorporated into disposable contact lenses, which then delivered the protein drugs over time.

According to the abstract, “It is expected that the nanoparticles-laden hydrogel lens materials are a new delivery system to deliver protein drugs, e.g. growth factors, to help blood vessel regeneration and potentiate greater angiogenesis.”

Abstract Title: Physical Activity, Television Viewing Time with Retinal Vascular Caliber: Multi-Ethnic Study of Atherosclerosis
Presentation Start/End Time: Tuesday, May 4, 2010, 3:45 – 5:30pm
Location: Hall B/C, Broward County Convention Center
Session Number: 375

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The Association for Research in Vision and Ophthalmology (ARVO) is the largest eye and vision research organization in the world. Members include more than 12,500 eye and vision researchers from over 80 countries. ARVO encourages and assists research, training, publication and knowledge-sharing in vision and ophthalmology. For more information, visit www.arvo.org

All abstracts accepted for presentation at the ARVO Annual Meeting represent previously unpublished data and conclusions. This research may be proprietary or may have been submitted for journal publication. Embargo policy: Journalists must seek approval from the presenter(s) before reporting data from paper or poster presentations. Press releases or stories on information presented at the ARVO Annual Meeting may not be released or published until the conclusion of the presentation.