21.   Ohlund, who wears a contact lens to improve his vision, said this year is the best he has felt since the injury.

22.   Subsequent clinical trials have confirmed that bilberry extract improves night vision in air-traffic controllers, pilots and automobile drivers.

23.   The flares, which improve night vision during patrols, apparently caused some injuries when people panicked.

24.   The U.S. Food and Drug Administration has approved an eye laser that polishes the cornea to improve vision and prevent the need for many corneal transplants.

25.   They had discovered that bilberry - Vaccinium myrtiullus -improves night vision.