Myopia is a refractive error that causes nearsightedness. The anatomy of the eye is such that light focuses in front of the retina creating a blurred image when looking at far away objects. The condition is very common, affecting approximately 30 percent of the total US population. The condition typically develops in childhood and gradually worsens throughout adolescence. Myopia is easily diagnosed with a comprehensive eye exam and corrected with various treatments, including glasses, contact lenses or refractive surgery.