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The best sources of this vitamin are cod liver oil, raw spinach, turnip tops, cream,cheese, butter, egg yolk, tomatoes, lettuce, carrot, cabbage, soya beans, green peas, wheatgerm,fresh milk, oranges and dates.Yogic exercises :The four yogic exercises prescribed for strengthening the optic nerve known as ???trataka??? asexplained in chapter 7 on yoga therapy should be practised daily.
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