Habitual ingestion of fruits and vegetables, such as carrots, kale, and green collards, seems to be protective against glaucoma.

​This study looked at the correlation between the consumption of fruits and vegetables and the tendency to develop glaucoma in older women. Researchers at the University of California examined the diets of 1,115 women using validated food frequency questionnaires. The odds of having glaucoma were ascertained in all the participants. 

Researchers observed that women with higher intake of fruits and vegetables, such as carrots, kale, peaches, and green collards, had better chances of preventing glaucoma compared to their counterparts who refrained from eating these foods. The results of this study show that increase in the frequency of consumption of certain fruits and vegetables may help to hold glaucoma at bay.