Tissue engineering of the cornea

Question 1

What is the structure of the eye?

Answer 1

1) Outer fibrous tunic
2) Middle vascular tunic
3) inner nervous tunic

Question 2

What does the outer fibrous tunic consist of?

Answer 2

1) corner: transparent, focuses light rays

2) sclera: white, protection and muscle attachment

Question 3

What does the middle vascular tunic consist of?

Answer 3

1) Choroid: absorbs scattered light
2) Ciliary body: holds lens and aids in focusing
3) Iris: colored part of the eye, diaphragm of connective tissue and smooth muscle

Question 4

What does the inner nervous tunic consist of?

Answer 4

retina

Question 5

What are the five layers of the cornea?

Answer 5

1) epthelium
2) Bowman’s Layer
3) Stroma
4) Descemet’s Membrane
5) Endothelium

Question 6

What is the ‘sixth’ layer of the cornea?

Answer 6

dua’s layer

- Tough, well-defined, acellular lining only about 10μm to 15μm thick

Question 7

What is the role of retina?

Answer 7

contains photoreceptors

Question 8

What are the five groups of neurons in the retina?

Answer 8

• direct impulses to brain: receptor cells, bipolar neurons, ganglion cells
• modify impulses: horizontal and amacrine cells

Question 9

What is the macula lutea in the retina?

Answer 9

contains fovea centralis, region of sharpest vision

Question 10

What is the optic disc in the retina?

Answer 10

: nerves and vessels leave the retina, lacks photoreceptors (blind spot)

Question 11

What are the layers of the retina?

Answer 11

1) sclera
2) choroid coat
3) pigmented epithelium
4) receptor cells (rods and cones)
5) bipolar neurons
6) ganglion cells
7) nerve fibres