The Eye

Question 1

How does the eye focus on nearby objects?

Answer 1

ciliary muscles contract
suspensory ligaments slacken
lens is thick
light is strongly refracted
light rays are focused onto the retina

Question 2

How does the eye focus on distant objects?

Answer 2

ciliary muscles relax
suspensory ligaments tighten
lens is thin
light is slightly refracted
light rays are focused onto the retina

Question 3

What is accommodation?

Answer 3

the process of changing the shape of the lens to focus on near or distant objects

Question 4

What is refraction?

Answer 4

the changing direction of light rays as they travel from one medium to another

Question 5

How does the pupil react to bright light?

Answer 5

circular muscles contract
radial muscles relax
pupil constricts to reduce light entering the eye

Question 6

How does the pupil react to dim light?

Answer 6

circular muscles relax
radial muscles contract
pupil dilates to allow more light in