Question

Which of the following is not an advantage of having two eyes?
A) It gives a wider field view
B) The ability to detect faint objects is enhanced with two detectors instead of one
C) It gives the ability to interpret the closeness of an object
D) It gives the eye higher protection from dust and pollution

Answer 1

Hint: Most of the living creatures in the world have two eyes. The number of eyes does not have a relation with higher protection. And it is the eyelid that plays a role in protecting the eyes from dust and other harmful particles.

Complete step by step solution:
As we know most of the organisms have two eyes. And the dual eyes improve vision through binocular vision. The advantages are binocular vision increases the range of our vision and gives a wilder field view. There are a lot of advantages that two eyes provide.

We are unable to judge depth, or the relative distance between objects, with one eye, especially when the objects are at some distance from the eye. We can even detect very faint objects since we have two detectors instead of one. And also it helps to determine the closeness as well as depth in objects and situations. We are also able to see in three-dimension.

We clearly know that having two eyes is in no way related to any protection from dust and pollution.

Final answer is: (D), It gives the eye higher protection from dust and pollution.

Note: Having two eyes would allow you to improve depth perception by overlapping the cone of vision of both eyes. Our both eyes are a few centimetres away from each other and the images formed in both of them are slightly different. But that does not cause any disturbances to our vision. It is the brain that combines both the image formed in the two eyes and makes vision meaningful.