What happens to light rays after they enter the eye through the pupil?
Light rays pass through a focussing system involving the cornea, the lens, and spaces in the eye filled with a watery fluid.
Where does most of the focusing in the eye occur?
It occurs in the cornea.
How does the lens change to focus on objects that are close?
The lens gets thicker when focussing on nearby objects.
How does the lens change to focus on objects that are distant.
The lens contracts when focussing on distant objects.
Why is the image of an object inverted when it strikes the retina?
It is inverted again because when the light is being crossed into the eye it crosses over turning it to be upside down.