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New research suggests time spent outdoors relates to risk of myopia, while vitamin D does not

Posted on: November 26, 2014   by  Jeff Nicklas


Recently, researchers found that vitamin D status was strongly related to time spent outdoors, but was not related to risk of myopia in children.

Myopia is a condition characterized by the eyes inability to focus correctly on exposure to light. It is often referred to as nearsightedness, as people with myopia can see objects close to them but not far away.

Reports show that nearly 70 million Americans have myopia and it is estimated to be one of the top three causes of registered blindness around the world.

In exploring the pathology of myopia, researchers have determined that two major risk factors for myopia are time spent outdoors and time spent reading.

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1 Response to New research suggests time spent outdoors relates to risk of myopia, while vitamin D does not

  1. [email protected]

    I do not find this study to be convincing evidence that Vit D is not a factor in myopia. Myopia is known to be multifactorial with strong genetic factors, peripheral retinal defocus, environmental issues related to lighting and distance activities and perhaps viral or other structure softening toxins. Hypothetically, Calcium and Vitamin D may affect scleral rigidity with a deficit leading to structural softening. It is expected that there would be a lot of individual variability based on genetic susceptibility. The average Vit D levels in this study were below optimum at low to mid 20’s ng/ml. I would be interested in seeing a study showing how kids with more optimal levels of > 35+ ng/ml compare to a similar cohort with ~ 20 ng/ml.

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