6-A       2017                 THE SENSE OF SIGHT    By Guillermo Linares Martínez.


Vision is the ability to interpret the environment thanks to the rays of light that reach the eye. It also

 means vision to see any action. The vision or sense of sight is one of the main sensory capacities of

humans and many other animals. There are different types of methods for vision screening.

The sense of sight or vision is ensured by a receiving organ, the eye; a membrane, the retina, these

receive the luminous impressions and transmit them to the brain through the optical pathways. The

 eye is an even organ located in the orbital cavity. It is protected by the eyelids and by the secretion of

 the lacrimal gland. It is mobilized by a group of extrinsic muscles commanded by the motor nerves 

of the eye.

PARTS OF THE EYE

From the days of Charles Darwin to the present, the origin of the eye has been much better

 understood. Although studying the structure of the ancestral eye through fossil evidence is

 problematic because the soft tissues leave no marks or remnants, the evidence from genetics and

comparative anatomy has increasingly supported the idea of a common ancestor for all the eyes.

  PERSONAL OPINION:

 My personal opinion about the sense of sight is that it seems the most useful because there are things 

that can not be felt with the hands