Despite direct proof of efficacy, it is logical to think UV-blocking contacts will help keep the eyes healthy, optometrists say.

WSJ: Contacts Lenses That Let In Sun, But Block UV Rays

Lacking so far is direct scientific proof that wearing ultraviolet-blocking contact lenses will prevent long-term eye issues.

WSJ: Contacts Lenses That Let In Sun, But Block UV Rays

But it does not say there's proof of a direct connection.

CNN: Debate over fracking, quakes gets louder

So, anyone trying to buy lab equipment or the kits needed for biology experiments online from eBay or direct from equipment manufacturers, would have to show some proof of identification so they could be tracked.

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