Myopia, commonly called shortsightedness, is a condition in which light is focussed in front of the retina, resulting in blurred vision. Shortsighted people can often see reasonably clearly at short distances, but will not be able to see distant objects clearly the prevalence of myopia in Norway seems to be somewhat lower than in Asia and Europe. There are few comparable studies concerning the prevalence rates of hyperopia
There is currently no cure for myopia, but spectacles, contact lenses and refractive surgery can all provide good distance vision for people with myopia. Wearing corrective lenses treats nearsightedness by counteracting the increased curvature of your cornea or the increased length of your eye. Levels of vitamin D are also being measured via blood and saliva samples.