There is some evidence to suggest that caffeine may be helpful for preventing and treating cataracts. There is no clear answer yet, but higher coffee intake has been associated with lower cataract risk.[1][2]
Vitamin supplements like vitamin E, vitamin C, and beta carotene have been studied as potential treatments for cataracts because they are antioxidants. However, the evidence does not support their use in cataract treatment yet. There is some research to suggest that the use of vitamin B supplements, especially vitamin B12, could play a role in cataract prevention.[3][3][4]