Light-induced corneal cross-linking corrects vision
Myopia, or short-sightedness, is almost twice as common in the US and Europe today than it was 50 years ago. It has also become an important problem in some Eastern Asian countries where it affects as much as 70 to 90% of the population. Although glasses and contact lenses are the first choice for many people, permanent vision correction by refractive surgery is becoming more popular, even though the procedure is not without risk. A team of researchers at Columbia University in New York has now developed a new, safe and non-invasive technique that makes use of a femtosecond laser to produce a low-density plasma in the cornea. The plasma generates reactive oxygen species that then react with collagenous tissue in the treated area to form cross-links and alter the refractive power of the eye.