The Eye - Accomadation

Question 0

What happens when you focus on a near object?

Answer 0

• the lens becomes more convex(rounded)

- the thicker lens refract rays more so they now focus on the retina

Question 1

What happens when you focus on a distant object?

Answer 1

• The lens becomes less convex (thinner)
• near objects appear blurred
• rays refract(bend) less

Question 2

What happens when you try to look at near objects with a thin lens?

Answer 2

• does not focus

- rays from close objects are not refracted enough to be focused on the retina

Question 3

What happens when you try to look at a distant object with a fat lens?

Answer 3

• it focuses early

- rays from distant objects are refracted too much and focus in front of the retina

Question 4

What do the muscles do when the lens is less convex?

Answer 4

• ciliary muscles relax

- suspensory ligaments are pulled tight

Question 5

How do the muscles make the lens more convex?

Answer 5

• ciliary muscles contract

- suspensory ligaments relax