World Without Glasses
Over the last few years, surgery has made it possible for the eye patients - a world without glasses.health and fitness Updated: Aug 11, 2003 18:50 IST
For millions of people around the world having refractive errors in vision, there has, until lately, been no alternative to wearing spectacles or contact lenses. Even though contact lenses have made a major difference in terms of appearance and convenience there are still a few problems associated with contact lenses.
Over the last few years surgery is starting to make a major difference to the lives of these patients by promising them a world without glasses or contact lenses.
What is a refractive error?
Normally, the rays of light entering the eye are brought to a precise focus on the retina, the light sensitive layer lining the back of the eye. When such a focus is not achieved, a refractive error results and the vision is not clear.
When the light rays are focused in front of the retina, the resulting condition is termed Myopia (short-sightedness). In Hyperopia (long-sightedness), the light rays come to a focus behind the retina.
Astigmatism (cylindrical error) occurs when incoming light rays are unable to reach a common focus within the eye.