A Comprehensive Literature Review of Vitamin D and Glaucoma

Background: The literature presents a multifaceted examination of the relationship between vitamins, particularly vitamin D, and glaucoma, with a focus on the implications of dietary factors on ocular health. The systematic review and meta-analysis by (Li et al., 2017) establishes a baseline by indicating no significant association between serum vitamin D levels and various types of glaucoma. However, the authors caution against definitive conclusions, emphasizing the need for larger studies to provide a clearer understanding of this relationship. Literature Review: Building on this foundation, (D. Ramdas et al., 2018) expands the investigation to include a broader spectrum of vitamins, revealing a beneficial association between dietary intake of vitamins A and C and open-angle glaucoma (OAG). The review underscores the complexity of the relationship between dietary habits and ocular health, noting that while dietary intake may influence glaucoma risk, blood levels of these vitamins do not consistently correlate with OAG. This complexity is further elucidated by the role of oxidative stress, which is posited as a significant factor in glaucoma pathogenesis. The exploration of neuroprotective properties of vitamins in glaucoma is further detailed by (Adornetto et al., 2020), which highlights the critical role of oxidative stress in the disease's progression. The authors link oxidative stress markers to increased intraocular pressure (IOP), suggesting that antioxidants from dietary sources may mitigate this risk. Conclusion: In conclusion, the literature indicates that while serum vitamin D levels do not appear to have a direct association with glaucoma, there is a potential beneficial role of dietary vitamins, particularly A and C, in influencing the risk and progression of glaucoma through mechanisms related to oxidative stress. The need for further research is emphasized to clarify these relationships and explore the potential of nutritional interventions in glaucoma management.