Eye Flashcards
1
Q
what happens when the eye looks at something near (4)
A
ciliary muscles contract
suspensory ligaments loosen
lens shape thickens
light is refracted strongly
2
Q
what happens when the eye focuses on something far
A
ciliary muscles relax
suspensory ligaments tighten
lens shape thins
light is refracted less
3
Q
what is longsightedness called
A
hyperopia
4
Q
what is wrong with the eye when it has hyperopia
A
eye is too short so lens can’t thicken enough; point where light rays meet is behind the eye; convex lens in front of eye refracts light more so rays are focused on retina
5
Q
what is short sightedness called
A
myopia
6
Q
what is wrong with the eye when it has myopia
A
eye ball is too long so lens focuses image in front of retina not on it
