Article: Tennis players test contrast-enhancing lens.

Byline: Andrea Gerlin

WIMBLEDON, England _ Tennis players who face big-serving opponents have a new weapon at their disposal, and it's not a racket.

It's a tinted, contrast-enhancing contact lens that even people with perfect sight can wear. The company that developed it, Atlanta-based Ciba Vision, claims the lens filters light to block out the background and highlights the bouncing yellow tennis ball, enabling players to follow it better.

The lens _ called ProSoft _ was introduced in the United States this year and is stirring speculation at Wimbledon that it could transform professional tennis. While scientific evidence to back up its maker's ...

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