Children below six years are treated only if the refractive error is high. Those between 6-16 years require constant correction and yearly checkups due to change in power with the growth of the eyeball. Myopia or short sight causes blurring of vision on viewing distant objects. It may be due to genetic developmental defect or even physical debility. It's onset is rare after 25 years.
Contact lenses play an important role in correction of myopia or short sight.
Other than the cosmetic advantage, they offer superior optical benefits. As they move up with the eye they are free of the aberrations which are unavoidable with thick spectacles. Contact lenses are also useful in patients with higher degrees of difference between the power of the two eyes. With the advent of soft contact lenses maintenance has become quite easy. The general hygienic treatment is no less important than the provision of spectacles.