Question

A deer has two eyes on the sides of its head while a tiger has both eyes at the front. Which of the following is the correct reason for the above assertion? (a) Deer has to see all sides around him for protection from predators while tiger has to follow only one prey. (b) Deer can see more grass while tiger can’t see grass (c) Both a and b (d) None of these​

Answer 1

A deer has two eyes on the sides of its head while a tiger has both eyes at the front.

The correct reason is (a) Deer has to see all sides around him for protection from predators while the tiger has to follow only one prey.

• Because of the higher densities of rods, motion detection is excellent. Deer can discern distant objects over a 310-degree field of vision without turning their heads because of this, as well as the positioning of their eyes on the sides of their skulls.
• However, this implies that deer have poor depth perception. Deer move their heads in a number of ways, as is clear. The horizontal pupil should be aligned with the landscape horizontal to be most effective. Horizontal variations in the landscape are influenced by head pitch (nose up or nose down).
• The eyes rotate about the optic axis in response to head pitch to preserve this horizontal pupil position. Since the eyes are laterally along either edge of the head, the rotation for each eye must be in the reverse direction.

Answer 2

• Answer: A deer has two eyes on the sides of its head while a tiger has both eyes at the front. The correct reason is (A) Deer has to see all sides around him for protection from predators while the tiger has to follow only one prey.