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Omega-3’s help slow vision loss

Retinitis pigmentosa (RP) is an inherited disease of the retina of the eye that first reduces peripheral, and then central vision, and makes it difficult to see at night. While there is no cure, doctors often prescribe vitamin A, which the retina needs to survive. In this study, researchers measured omega-3’s in the diets of 357 adults with RP who had been taking 15,000 IU of vitamin A palmitate per day for an average of five years, under the care of a physician.

Comprared to those who consumed low levels of omega-3’s, those who got an average of at least 200 mg of omega-3 fatty acids per day saw acuity for distance vision decline 40 percent more slowly annually, and central field-of-vision decline 50 percent more slowly. Doctors explained that omega-3’s help proteins in the eye transport vitamin A to the retina.

 

Zeaxanthin and lutein improve vision in AMD

Age-related macular degeneration (AMD) is the loss of sight in the central field of vision, the most common form of blindness. In this study, 60 people, average age 75, with mild to moderate AMD, took 8 mg of zeaxanthin per day, alone or with 9 mg of lutein, or lutein alone. After one year, those taking zeaxanthin could read 1.5 more lines on the standard eye chart and had lost all blind spots. Those who took lutein could better detect subtle contrasts and recover from glare faster. Doctors concluded that zeaxanthin improves high-contrast vision, and lutein improves low-contrast vision and glare recovery in AMD.

Reference: Archives of Ophthamology; February, 2012, Electronic Prepublication

From the June 2012 newsletter

Van's Health on July - 5 - 2012
categories: Supplements, Vitamins

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