Can DHA supplementation improve dark adaptation?
Just as RP patients have difficulty seeing in dim environments, so do many people suffering from dyslexia, a common learning disorder. In a small study of five dyslexic adults with poor dark adaptation (night vision) and five normal controls, Dr. B. Stordy at the University of Surrey, Guildford, England, gave all subjects the same dose of 480 mg of DHA with no additional vitamin A or D for one month. In four controls, dark adaptation remained the same, as expected, but in one, it clearly improved. (Interestingly, this person was a strict vegetarian, and as we considered previously, vegetarians have lower DHA levels.) On the other hand, dark adaptation consistently and significantly improved in the five with initially poor night vision. While more research needs to be done, DHA promises to be a part of treating vision problems such as poor dark adaptation. Studying how DHA can help optimize our minds and vision has barely begun.
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