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Vitamins and ocular health: a perspective on nutritional influence in vision disorders

  • Pragati Garg
  • Shrinkhal Shrinkhal
  • Ruchi Shukla
  • Aparajita Shukla
  • Swarastra P Singh
  • Shourriya Garg

Medical hypothesis, discovery & innovation in optometry, Vol. 7 No. 2 (2026), 24 July 2026 , Page 97-106
https://doi.org/10.51329/mehdioptometry250 Published 24 July 2026

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Abstract

Background: Vitamins are essential for ocular health, and their deficiencies are associated with xerophthalmia, age-related macular degeneration (AMD), cataracts, glaucoma, diabetic retinopathy (DR), dry eye disease (DED), keratoconus, and optic neuropathies. Beyond preventing nutritional deficiency disorders, vitamins contribute to phototransduction, antioxidant defense, immune regulation, and maintenance of retinal, corneal, and optic nerve function. This narrative review summarizes current evidence on the role of individual vitamins in ocular health, highlights clinical findings, and identifies research gaps.
Methods: A targeted search of PubMed/MEDLINE and Google Scholar was conducted for English-language studies published primarily between 2000 and 2025, supplemented by earlier landmark studies relevant to established nutritional interventions. Keywords included “vitamins”, “ocular health”, “eye disease”, “antioxidants”, “retina”, “cornea”, and “nutritional deficiency”. Relevant clinical trials, observational studies, reviews, and guidelines were included. Non-English-language studies and unrelated nutritional research were excluded.
Results: Vitamin A is crucial for phototransduction and epithelial integrity; deficiency leads to night blindness, xerophthalmia, and corneal disease. B-complex vitamins, particularly B1, B2, B6, B12, and folate, are associated with neuro-ophthalmic function, retinal vascular health, and homocysteine metabolism. Vitamin C, a potent antioxidant, may protect against oxidative damage in the lens and retina and promotes corneal wound healing. Vitamin D has been investigated in DED, glaucoma, DR, keratoconus, and AMD because of its proposed anti-inflammatory, antioxidant, neuroprotective, and anti-angiogenic properties; however, evidence supporting supplementation remains condition-specific and generally limited. Vitamin E has antioxidant functions in retinal tissues and forms part of the combined AREDS/AREDS2 formulations, although vitamin E supplementation alone has not demonstrated a substantial reduction in incident AMD. Additional evidence supports the complementary role of lutein, zeaxanthin, omega-3 fatty acids, and zinc in maintaining retinal integrity and ocular surface health. Deficiencies, malabsorption syndromes, aging, and poor dietary habits contribute to ocular morbidities linked with hypovitaminosis.
Conclusions: Adequate intake of vitamins and selected micronutrients is essential for ocular surface maintenance, retinal function, optic nerve health, and protection against oxidative stress-related diseases. Nutritional assessment and correction of confirmed deficiencies are important in at-risk populations. However, evidence supporting supplementation to prevent or delay ophthalmic disease is condition- and nutrient-specific, with the clearest clinical benefit established for AREDS2 supplementation in appropriately selected patients with AMD. Further large-scale randomized controlled trials are warranted to establish evidence-based therapeutic guidelines and optimal supplementation strategies.
Keywords:
  • vitamin
  • B vitamin
  • riboflavin
  • vitamin B 6
  • pyridoxamine
  • vitamin B 12
  • hydroxocobalamin
  • vitamin D
  • vitamin E
  • vitamin A
  • ascorbic acid
  • folic acid
  • omega 3 fatty acid
  • flavonoid
  • eye
  • cataracts
  • dry eye disease
  • age-related macular degeneration
  • optic neuropathy
  • Full Text PDF

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Medical Hypothesis, Discovery & Innovation in Optometry
ISSN 2693-8391