This 2021 review by five ophthalmologists and two researchers characterized findings of food effects on human vision:

“The most challenging ocular disorders are uncorrected / under-corrected refractive errors, ocular surface dysfunction / dry eye disease, cataracts, glaucoma, diabetic retinopathy (DR), and age-related macular degeneration (AMD):

• Severe visual impairment and blindness due to cataract or refractive error constitutes half of all global cases;
• Glaucoma is the most common cause of irreversible blindness;
• DR is the first cause of visual disability in working-age adults; and
• AMD is the first cause of blindness in the elderly.

We identify directions for further research on:

• The role of diet and nutrition in eyes and vision;
• Potential antioxidant, anti-inflammatory, and neuroprotective effects of natural food (broccoli, saffron, tigernuts and walnuts);
• The Mediterranean Diet; and
• Nutraceutic supplements that may supply a promising and highly affordable scenario for patients at risk of vision loss.

We improve understanding of natural food nutritional hallmarks, benefits of the MedDiet, and appropriate oral supplements with vitamins, carotenoids and PUFAs for better eye and vision care.”

https://www.mdpi.com/2304-8158/10/6/1231/htm “Searching for the Antioxidant, Anti-Inflammatory, and Neuroprotective Potential of Natural Food and Nutritional Supplements for Ocular Health in the Mediterranean Population”

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