what is the difference between the eyes of owl and crab?
Answers
Explanation:
Owl's eye.
Of all an owl's features, perhaps the most striking is its eyes. Large and forward facing, they may account for one to five percent of the owl's body weight, depending on species. The forward facing aspect of the eyes that give an owl its "wise" appearance, also give it a wide range of "binocular" vision (seeing an object with both eyes at the same time). This means the owl can see objects in 3 dimensions (height, width, and depth), and can judge distances in a similar way to humans. The field of view for an owl is about 110 degrees, with about 70 degrees being binocular vision.
Crab's eye.
The compound eyes on a crab's eye stalks help him detect UV light in low light conditions more than a half mile below the surface of the ocean. Studies by Duke University show that the compound eyes help crabs pick up on bioluminescent colors of the plankton and other crustaceans that makes up their diet, as well as patterns in the shells of other crabs that help them tell potential mates from rivals.