Layers of the eye

Question 1

Fibrous layer

Answer 1

• Made upon the sclera (back) and the cornea (front)
• Complete the whole way round
• Most outer layer

Question 2

How is the ratio of sclera to cornea subdivided?

Answer 2

Sclera: posterior 5/6th
Cornea: anterior 1/6th

Question 3

Appearance of the cornea and the sclera

Answer 3

cornea: transparent
Sclera: opaque

Question 4

function of cornea and sclera

Answer 4

cornea: allows rays through
Sclera: point of attachment of muscles of the eye

Question 5

What makes up the vascular layer of the eye

Answer 5

• Choroid
• Ciliary body
• Iris

Question 6

Function of the components of the vascular layer

Answer 6

Ciliary body:

• Suspends the lens via suspensory ligaments
• Produces acqueos humour
• Attached to the ciliaris muscle (controls the activity (focus) of the lens)

Choroid:
-blood supply to outer layers of the retina

Iris:
-controls the diameter of the eye and therefore the amount of light entering the eye

Question 7

Characters of the lens

Answer 7

Transparent and biconvex

Can change shape to become more of less convex

Question 8

What makes up the sensory layer of the eye

Answer 8

Retina
Incomplete layer
Ends up at the ora serrata
Made up of 10 layers

Question 9

Function of the retina?

Answer 9

site where image is formed due to the presence of rods and cones

Question 10

Segments of the eye

Answer 10

Anterior:

• In front of the lens
• Filled with aqueous humour

Posterior:

• Behind the lens of the eye
• Filled with virtuous gel

Question 11

Chambers of the eye

Answer 11

divisions of the anterior segment of the eye
Anterior: in front of the iris
Posterior: behind the iris