The Iris Flashcards
1
Q
Location: Anteriorly
A
Covered by the aqueous
2
Q
Location: Posteriorly
A
In contact with crystalline lens
3
Q
Location: Peripherally
A
Continues with ciliary body at iris root
4
Q
Dimensions: Diameter
A
13mm
5
Q
Dimensions: Thickness at Root
A
0.1mm
6
Q
Dimensions: Thickness at Collarette
A
0.6mm
7
Q
Function (4 features)
A
- Controls the amount of light reaching retina
- Reduces aberrations (acts as a stop)
- Communicates emotion
- Provides a route for metabolites to and from the aqueous.
8
Q
Blood Supply
A
Major arterial circle in ciliary body
9
Q
Nerve Supply: Motor
A
Innervation from oculomotor nerve - CN3
10
Q
Waste Product Removal
A
Follows path back to ciliary body and then drains into ciliary veins or vortex veins
11
Q
Layers: Anterior
A
Anterior Border Layer
12
Q
Layers: Middle
A
Stroma
13
Q
Layers: Posterior
A
Epithelium
14
Q
Another word for: Dilation
A
Mydriasis
15
Q
Another word for: Constriction
A
Miosis
