She opened her eyes, and the keen vision of the eagle was more brilliant even than before.

The spiders are aided in their hunting by keen vision, with four pairs of eyes.

Don had keen vision, and was a dead shot with a rifle.

Would the sailors with their keen vision pronounce it to be a sail?

Truly, Stranger, you see with the keen vision of age.

With his keen vision The Shadow looked after the two men who had gone down the path.

Possessed of keen vision, he soon became a crack shot.

However, many animals have also come to rely on light, particularly those with keen vision.

A lifeguard's most vital tools are keen vision and judgment.

They must be able to detect motion quickly, so they have keen vision.