The Eye Flashcards
(13 cards)
1
Q
The Structure of the Eye
Cornea
A
- Transparent layer to allow light into the eye
2
Q
The Structure of the Eye
Lens
A
- Help focus image
3
Q
The Structure of the Eye
Iris
A
- Controls amount of light entering the eye
4
Q
The Structure of the Eye
Suspensory Ligaments
A
- suspends the lens in place
5
Q
The Structure of the Eye
Ciliary Muscle
A
- A ring of muscle that change the shape of the lens for focusing on objects at diff distances
6
Q
The Structure of the Eye
Sclera
A
- Tough outer coat of the eye
7
Q
The retina
Cone cells
A
*helps see colour
8
Q
The retina
Rod Cells
A
*helps detect light
9
Q
What 2 muscles are in the iris
A
- The radial muscles and circular muscles
10
Q
Iris Reflex in bright light
A
- PROTECTS EYE
- less light enters the eye
-circular muscles contract
-radial muscles relax
-pupil constricts
11
Q
Iris Reflex in dim light
A
-pupil dilates
-C muscles relax
-R muscles contract
-more light enters eye
12
Q
Accommodation of close objects
A
-ciliary muscles contract
-suspensory ligaments slacken
-lens becomes fatter
- increasing the
amount of light refracted.
13
Q
Accommodation of distant objects
A
-ciliary muslces relax
-suspensory ligaments tighten
-the lens becomes thinner
- decreasing the
refraction of light.
