Parts of the Eye Flashcards Preview

Neuro Block 3 > Parts of the Eye > Flashcards

Flashcards in Parts of the Eye Deck (25):
1

At what level do we consider ocular movements?

  1. nuclear = the cranial nerves
  2. inter-nuclear = connection between CN 3,4,6
  3. supranuclear = gaze center (brodmann 8)

2

what is the sclera?

  • outermost covering of the eye used to maintain the shape. 
  • The extraocular muscles are attached to it.  

3

what is the cornea?

clear extension of the sclera

4

which layer of the eye is considered the vascular layer?

choroid

5

what is the choroid?

Layer underneath sclera containing blood vessels. 

6

Front of choroid has two parts, which are they?

  1. Ciliary Body
  2. Iris

7

what is the ciliary body?

Determines shape of lens and produces aqueous humor.

 

8

what is the iris?

 Adjustable diaphragm that surrounds the pupil.  Constrictor and Dilator muscles.

 

9

which layer of the eye absorbs the scattered light?

Choroid 

10

which structure in the eye contains the constrictor and dilator muscles?

the iris

11

what is the retina?

area that contains rods and cones.

12

which part of the eye contains the innermost layer?

the retina

13

what is the macula?

the center of the retina

14

what does the macula contain?

the fovea centralis

15

does the fovea centralis contain rods or cones?

cones

16

what structures make up the Optic disc?

do these structures go in or out?

CN II, veins, arteries

exit

17

what is the Optic or Physiological Cup?

Depression in the center of the Optic Disc.

 

18

what is the Aqueous Humor?

Watery fluid in the front section of the eye.

19

the Front section of the eye is divided into two parts:

  1. Anterior chamber
  2. Posterior chamber

20

where is the anterior chamber?

where is the posterior chamber?

in front of the iris

behind the iris

21

what is the Vitreous Humor?

Jelly-like fluid in the back part of the eye.

 

22

what strucutre allows you to see in black and white?

what strucutre allows you to see in color?

rods

cones

23

how many rods do you have?

how many cones do you have?

120million

60 million 

24

what cells make up the optic nerve?

ganglion cells

25

what is the Pigment epithelium?

what is its function?

degeneration of this structure is involved in what 2 diseases?

Between choroid and retina

Provides blood-brain barrier for eye

  1. macular degeneration
  2. retinitis pigmentosa