human eye Flashcards
memorize
1
Q
what is the pupil
A
black hole that allows light to pass through lens
2
Q
what is the retina
A
detects light and forms a smaller, inverted and real image
3
Q
what is a lens (in an eye)
A
refracts and focuses light
4
Q
what does someone with hyperopia see
A
sees things clearly in distance yet blurry up close
5
Q
what does someone with myopia see
A
sees things clearly up close yet blurry in distance
6
Q
in hyperopia the image naturally focuses
A
behind retina
7
Q
in myopia the image naturally focuses
A
infront of retina
8
Q
how do you fix hyperopia
A
add converging (convex) lens glasses
- this will move the rays closer together and move focus forward onto retina
9
Q
how do you fix myopia
A
add diverging (concave) lens glasses
- this will spread rays apart and move the focus back onto retina
