THE 5 SENSES

                                                   SIGHT
                 
    Light enters through the cornea and the pupil. The iris is a muscle that makes the pupil bigger or smaller and controls the amount of light that enters our eye. The lens focuses the light which allows the image to be project. Nerve receptors in the retina sends this information along the optic nerve to our brain. The blins spot doesn´t respond to light.

The parts of an eye:
https://www.thinglink.com/scene/510865757748330497


How an eye see:

http://www.cyh.com/HealthTopics/Library/eyewk-2a.gif