Visual system Flashcards
1
Q
The three coats of the eye
A
1) outer fibrous layer of connective tissue forms the cornea
2) the middle vascular layer composed of the iris, ciliary body and choroid
3) the inner neural layer of retina
2
Q
The three spaces of the eye
A
1) anterior chamber
2) posterior chamber
3) vitreous chamber
3
Q
outer dense connective tissue of the eye
A
- provides protection for the structure within
- maintains shape of globe
- provides resistance to pressure of fluids inside
4
Q
sclera
A
- opaque white of the eye
- covered by transparent conjunctiva
5
Q
cornea
A
- allows light rays to enter the globe
- reflects light rays into focus on retina
6
Q
limbus
A
- region of transition from cornea to sclera
7
Q
uvea
A
- vascular layer of the eye
- made up of three structures
8
Q
iris
A
- most anterior structure
- acts as diaphragm to regulate amount of light entering pupil
9
Q
ciliary body
A
- at root of iris
- produces components of aqueous humor
- contains muscle that controls shape of the lens
10
Q
choroid
A
- posterior part of uvea
- network of blood vessels with dense capillary network
- surrounds retina
- supplies nutrients to outer retinal layers
11
Q
retina neural tissue function
A
- by complex biochemical processes, changes light energy into signal that can be transmitted along a neural pathway
12
Q
where does the light energy signal exit the eye?
A
- optic nerve
