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Background: To study the levels of vitamin D serum levels in children with vernal keratoconjuctivits (VKC) and comparing vitamin D levels in after giving vitamin D supplements between intervention and control group. Methods: The study was conducted in population between 1 to 12 years in tertiary care hospital in North India. Amongst children with VKC, full ocular examination along with Boninis clinical grading of VKC and serum vitamin D levels were assessed. Whole study group was randomly divided into two groups. Intervention group had received vitamin D powder while control group kept under observation. Results: A total of 88 children received vitamin D supplementation and 39 kept in control group. Conclusion: Our study suggests that children in intervention group showed improvement in serum vitamin D levels with the clinical improvement in VKC grading too.