Eye anatomy

Question 1

What are the layer layers of the eye?

Answer 1

1. fibrous layer
2. vascular layer
3. inner layer

Question 2

What does the fibrous layer contain

Answer 2

1. cornea
   transparent- this is where light is refracted
2. sclera
   provides attachment to the extra ocular muscles.

Question 3

What does the vascular layer contain

Answer 3

1. choroid (connective tissue and blood vessels. nourishment to layers)
2. ciliary body (ciliary muscle and processes, controls shape of the lens. helps form acqeous humour)
3. iris (circular strucutre, aperture in the middle (pupil) diameter of the pupil is affected by smooth muscle fibers.

Question 4

What does the inner layer contain

Answer 4

1. pigment (outer) layer
   single layers of cells attached to the choroid which absorbs the light
2. neural (inner) layer
   photoreceptors, light-detecting cells

the anterior pigment layer is ‘nonvisual retina’ as it contains no neural layers just pigment

the posterior and lateral contain both pigment and neural so is called the ‘optic part of the retina’

Question 5

optic disc

Answer 5

where the optic nerve enters the retina
no light detecting cells

macula- highly pigmented, yellow
fovea- a depression in the macula high conc of light detecting cells

Question 6

anterior chamber

Answer 6

fluid filled area beween the cornea and iris
filled with aqeous humor
clear plasma like fluid which nourishes and protects the eye
drains via the trabecular meshwork

glaucoma

Question 7

posterior chamber

Answer 7

fluid filled area between the iris and ciliary process

Question 8

extra ocular muscles

Answer 8

LR(6) SO(4) R(3)

Lateral rectus- Abducens Nerve (CN VI)

Superior Oblique (Trochlear IV)

Rest of the nerves (Oculomotor III)