Vision Health and the Influence of Diet
Vision Health and the Influence of Diet
Joy Stepinski, MSN, RN-BC
April 19, 2026
Did you know that the food you eat today may influence your vision later in life? While nutrition is often linked to conditions like heart disease and diabetes, it also plays an important role in eye health.
Over the past couple of months, we have discussed several barriers to nutritional intake, including a lack of awareness of the importance of food to the body. Nutrition plays a large role in the development and prevention of chronic diseases, such as heart disease, diabetes, cancer, and obesity. One of the overlooked ways that food is protective in the body is vision, as the eyes depend on nutrients to function properly.
A common condition affecting vision is cataracts. When light enters the eye, it passes through the lens to the retina. Normally, the lens is clear. However, in cataracts, the lens becomes progressively cloudy [1], impairing light passage and leading to blurred vision. While cataracts can affect people of any age, they are most frequently found among older adults. Common symptoms are blurred vision, difficulty seeing at night, halos around lights, and eye discomfort. If left untreated, cataracts can cause significant vision loss or blindness. Treatment options may include wearing corrective lenses in the early stages or surgical removal of the cloudy lens in advanced cases.
Research suggests that diet and other lifestyle factors may influence the development of cataracts. A meta-analysis of nine studies suggested that higher vegetable intake was inversely associated with cataract risk [2]. The authors noted that vegetables contain numerous beneficial nutrients, including fiber, folate, beta-carotene, vitamins, phytoestrogens, and others, which may be protective against oxidative stress and DNA damage.
Other studies support a relationship between diet and cataract risk. In a British cohort study of 27,670 nondiabetic participants, higher fruit and vegetable intake was associated with a reduced risk of cataract development [3]. Similarly, a case-control study in India compared 140 individuals with cataracts to 100 controls of similar age and sex. The authors found that cataract prevalence was higher in subjects with lower amounts of intake of micronutrients, such as beta-carotene, folate, and polyphenols. [4]. These individuals consumed fewer green leafy vegetables, fruits, and tea, and higher amounts of animal and fried food.
In addition to diet, studies show that cataracts are associated with lifestyle-related health conditions. In a study using data from the Longitudinal Health Insurance Database 2000 [5], 32,456 participants diagnosed with cataracts were matched with the same number of controls. Over a 12-year follow-up period, the cataract group showed a higher incidence of ischemic heart disease.
Diabetes mellitus is a condition that often affects vision health. Cataracts are a leading cause of vision loss among patients with the disease [6]. In diabetes, blood glucose can affect the lens of the eye. This leads to the accumulation of a substance called sorbitol, which draws fluid into the lens. As a result, the lens swells and becomes cloudy, leading to cataracts.
In a study including 319 participants diagnosed with diabetes, researchers examined risk factors and conducted comprehensive eye examinations. Of the total participants, 105 developed cataracts. The authors identified several associated risk factors, including longer disease duration, smoking, and poor metabolic control (i.e., blood pressure, blood lipids, and blood glucose). Additionally, cataracts were more common among individuals with chronic kidney disease and diabetic peripheral neuropathy. The study showed that glycemic control is an important factor in reducing the risk of cataracts.
Cataracts are not solely the result of aging. As evidence shows, diet and other lifestyle factors may influence their development and progression. Overall, nutrition choices can play a role in protecting overall eye health.
References
Nizami, A. A., Gurnani, B., Gulani, A. C., & Redmond, S. B. (2024). Cataract (nursing). In StatPearls. https://www.ncbi.nlm.nih.gov/sites/books/NBK568765/
Huang, G., Wu, L., Qiu, L., Lai, J., Huang, Z., & Liao, L. A. (2015). Association between vegetable consumption and the risk of age-related cataract: A meta-analysis. International Journal of Clinical and Experimental Medicine, 8(10), 18455. https://pmc.ncbi.nlm.nih.gov/articles/PMC4694352/
Appleby, P. N., Allen, N. E., & Key, T. J. (2011). Diet, vegetarianism, and cataract risk. The American Journal of Clinical Nutrition, 93(5), 1128-1135. https://doi.org/10.3945/ajcn.110.004028
Tarwadi, K. V., Chiplonkar, S. A., & Agte, V. (2008). Dietary and nutritional biomarkers of lens degeneration, oxidative stress and micronutrient inadequacies in Indian cataract patients. Clinical Nutrition, 27(3), 464-472.
Hu, W. S., Lin, C. L., Chang, S. S., Chen, M. F., & Chang, K. C. (2016). Increased risk of ischemic heart disease among subjects with cataracts: A population-based cohort study. Medicine, 95(28), e4119. https://doi.org/10.1097/MD.0000000000004119
Ivanescu, A., Popescu, S., Gaita, L., Albai, O., Braha, A., & Timar, R. (2024). Risk factors for cataracts in patients with diabetes mellitus. Journal of Clinical Medicine, 13(23), 7005. https://doi.org/10.3390/jcm13237005