When light enters the eye through the pupil , that light falls on the retina, and receptors are cells in the retina that perceive light. Given these facts, what is used to perceieve light inside the pupil among the following options:
- an electron lens
 - It expands
 - Receptor Cells
 - heat energy
 - Energy.
 - focusing a lens
 - sensory neurons
 - observe it


 

   Receptor Cells      