People who have not taken adequate precautions and have neglected to live by the health norms need a combination of vitamins if they are to be kept safe from the oxidative stress of the free radicals. People who have smoked heavily all along and people who have been undernourished can benefit from the power of vitamins. These people need vitamin supplements that include three vitamins A, B and C for protecting them against cataract in their old age. The free radicals deposit a thin protein layer on the eye lens and this can be prevented by the antioxidant power of the vitamins.