purkinje images Flashcards
1
Q
How are they created?
A
when the light strikes the cornea and passes from the air into the vitreous humour. The light rays that strike the curved surface of cornea bend so they converge on the back of the eye.
2
Q
How does the light refraction occur?
A
In 3 interfaces:
- the corne
- the anterior part of lens
- posterior part of the lens
- -> 3 images can be seen
3
Q
Who discovered this phenomenon?
A
J.E. Purkyně
4
Q
The ability to adjust the strength of the lens is called?
A
Accomodation
5
Q
What does the strength depend upon?
A
The shape regulated by the cilliary muscle and tension/relaxation of the suspensory ligaments
6
Q
How does the purkinje images change during accomodation?
A
midlle becomes sharper, smallest appears closer
