All the forms of life that we know today are the result of adapting to the conditions of survival. The characteristics, as well as the ability to perform certain actions, passed through the judicious field of evolution on Earth. With that, the organs, body and senses went through a series of adaptations according to each species.
For example, vision is a very keen sense for some animals that survive from hunting. For others, it serves to help locomotion. Even animals without eyes know how to differentiate the presence or absence of light, such as earthworms.
Birds and mammals have more complex eye structures, capable of capturing detailed images. Some insects and marine animals have photoreceptor units in place of the eyes that form the image as a large mosaic. There are even animals with four eyes. However, the most common are divided into two large groups: those with eyes in front and on the sides. Let’s get to know them more in depth.
Animals with eyes in front
The most complex and most efficient eyes belong to birds and mammals. They are able to adjust the vision according to the light and sharpness conditions.
The birds that practice great flights are experts on the subject. They have large eyes, often larger than the brain, located in front of the face. The hawk, for example, is able to see objects more clearly than humans. This happens both with long distances, and with things very close.
When the eyes are located in the front, they form a unique image in the brain, which gives a binocular field of view. Owls are like that. This makes hunting easier at night, as their eyes may even turn into orbit making it easier to find prey.
However, a disadvantage of these animals with frontal eyes is that they are an easier target for other predators precisely because they do not have lateral vision, like other animals that we will know now.
Animals with side eyes
Most fish have monocular vision, meaning that each eye sees something different. So, in some cases, each turns to one side to locate food and predators. These animals have evolved over the millennia to adapt to the darkness of the sea depths.
Another animal that is famous for this characteristic is the chameleon. Not only does he have eyes on the sides, but he has the ability to move them to different areas, this helps him to escape from predators frequently, to hunt and mate.