A technology derived from the study of stars could soon counter the epithet "as blind as a bat" with "as clear as the Keck."

Researchers from the University of Rochester have developed a technique for making eyeglass lenses shaped to correct imperfections in the eye. The technology used is called adaptive optics and is employed in some optical telescopes, like the ones at the giant Keck Observatory in Hawaii.

Telescopes with adaptive optics can adjust the shape of mirrors in response to atmospheric conditions. Tailored for the human eye, the technology is used to shape eyeglass lenses to fit and compensate for the exact deformities of a person's eyes.

The process begins by creating a detailed topographical map of the eye. A spot of light is shined onto the eye and the reflections are collected. A sensor analyzes the results and shows, with striking precision, the imperfections in the cornea and lens.

According to Rochester scientist David Williams, the technique can diagnose up to 65 problems with the shape of the eye. Today, most ophthalmologists diagnose only two defects -- astigmatism and focusing problems.

Mosaic of cone photoreceptors in the living eye

Once the measurements are made, they can be used to shape a custom device -- one that can bend as slightly as one-fiftieth the thickness of a human hair to counteract the imperfections of an eye.

The system can improve vision to better than 20/20. "It's like needing glasses and getting them for the first time," said Williams, in a statement. "When you're using the adaptive optics system, you just say 'wow.'"

Adaptive optics not only improves the level of detail the eye can see, it also enhances night vision.

The technique cannot be applied to eyeglasses yet, but Williams said he believes adaptive optics could eventually make perfect vision one eye scan away.