Refractive Error Flashcards
1
Q
define
A
eyes cannot clearly focus an image on the retina
2
Q
what is responsible for focusing images on the retina?
A
cornea (2/3rd)
lens (1/3rd)
3
Q
different types
A
myopia
hypermetropia
astigmatism
presbyopia
4
Q
define myopia
A
short sighted
image focused in front of the lens
correct with concave lenses
5
Q
define hypermetropia
A
long-sighted
image focused behind the retina
correct with convex lenses
6
Q
astigmatism
A
irregular corneal curvature
7
Q
presbyopia
A
loss of accommodation reflex due to stiffening of the lens with age so cannot change shape as easily
8
Q
management
A
glasses
