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Myopia is associated with lower vitamin D status in young adults
Yazar, S and Hewitt, AW and Black, LJ and McKnight, CM and Mountain, JA and Sherwin, JC and Oddy, WH and Coroneo, MT and Lucas, RM and Mackey, DA, Myopia is associated with lower vitamin D status in young adults, Investigative Ophthalmology and Visual Science (Iovs), 55, (7) pp. 4552-4559. ISSN 0146-0404 (2014) [Refereed Article]
METHODS: A total of 946 individuals participating in the 20-year follow-up of the Western Australian Pregnancy Cohort (Raine) Study were included in this study. Ethnicity, parental myopia, and education status were ascertained by self-reported questionnaire. A comprehensive ophthalmic examination was performed, including postcycloplegic autorefraction and conjunctival UV autofluorescence photography. Serum 25-hydroxyvitamin D₃ (25(OH)D₃) concentrations were determined using mass spectrometry. The association between serum 25(OH)D₃ concentrations and prevalent myopia was determined using multivariable logistic regression. Myopia was defined as mean spherical equivalent ≤ -0.5 diopters.
RESULTS: Of the 946 participants, 221 (23.4%) had myopia (n = 725 nonmyopic). Myopic subjects had lower serum 25(OH)D₃ concentrations compared to nonmyopic participants (median 67.6 vs. 72.5 nmol, P = 0.003). In univariable analysis, lower serum 25(OH)D₃ concentration was associated with higher risk of having myopia (odds ratio [OR] for <50 vs. ≥50 nmol/L: 2.63; confidence interval [95% CI] 1.71-4.05; P < 0.001). This association persisted after adjustment for potential confounders, including age, sex, ethnicity, parental myopia, education status, and ocular sun-exposure biomarker score (adjusted OR 2.07; 95% CI 1.29-3.32; P = 0.002).
CONCLUSIONS: Myopic participants had significantly lower 25(OH)D₃ concentrations. The prevalence of myopia was significantly higher in individuals with vitamin D deficiency compared to the individuals with sufficient levels. Longitudinal studies are warranted to investigate whether higher serum 25(OH)D₃ concentration is protective against myopia or whether it is acting as a proxy for some other biologically effective consequence of sun exposure.
|Item Type:||Refereed Article|
|Keywords:||Myopia; Ocular sun exposure; Raine Study; Vitamin D; Young adults|
|Research Division:||Biomedical and Clinical Sciences|
|Research Group:||Ophthalmology and optometry|
|Objective Group:||Clinical health|
|Objective Field:||Clinical health not elsewhere classified|
|UTAS Author:||Hewitt, AW (Professor Alex Hewitt)|
|UTAS Author:||Oddy, WH (Professor Wendy Oddy)|
|UTAS Author:||Mackey, DA (Professor David Mackey)|
|Web of Science® Times Cited:||68|
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