Fact 1: Light enters the eye through an opening called the pupil.

Fact 2: Light rays are focussed on the retina.

Given the two facts above, answer the question "Where do rays enter the eye?" with the following options: 
- glass
 - Summer
 - pupil
 - lenses
 - harmful
 - the sun
 - photons
 - skin


 

   pupil      