Nearsightedness, also known as myopia, is a vision problem in which close objects appear clear but distant objects appear blurry. This condition is said to be caused by refractive errors. Refraction is the bending of light as it passes through one object to another.
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Spending time outdoors offers exposure to multiple types of light, including ultraviolet B rays (UVB, which leads to the production of vitamin D) and visible bright light.
ReplyDeleteAs for how much time outdoors is necessary for eye health, research by researcher Ian Morgan of the Australian National University, suggests three hours per day with light levels of at least 10,000 lux may protect children from nearsightedness.
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