Eagle eye restored by operation

"A golden eagle who was blinded after flying into an electricity pylon has had her vision partially restored by a ground-breaking operation. Electra the eagle lost her sight when she developed cataracts after flying into the pylon as she tried to escape attack from crows on...

Cows not all black and white

"Research on colour vision in farm animals shows that they are dichromats with cones (colour sensitive retina cells) most sensitive to yellowish-green and blue purple light. Humans are trichromats and see the full colour spectrum. Dichromatic vision may make the animal...

Stereograms and Eyesight Improvement

How eyesight can be improved through eye muscles exercising. Stereograms watching is the best exercise, although the ability to see the 3d images requires a lot of practice