The sight

 

                                THE EYE
   The eye are the organ                                                     
  are protected by  eyebrows, the eyelids and eyelashes. 

                                      THE PROCESS
First the light reach the cornea then passes the pupil  afer pass to the lens and the information pass to the optic nerve.
                                     
                                         THE PARTS
 The parts are:
eyebrow, pupil, iris, eyeball, eyelashes 
and eyelids.

THE EYE SERVES TO:

The eye serves to see.

We have two eyes