Anatomy of the eyes

Question 1

what goes out through the surpaorbital notch

Answer 1

the supraorbital nerve

Question 2

where do most fractures of the orbit occur and what bone is broken

Answer 2

medial wall (lacrimal bone)

Question 3

What are the main structures of the eyeball?

Answer 3

Sclera
Cornea
Uvea (cilliary body, iris and choroid)
Retina

Question 4

how are collagen fibres organised in the cornea?

Answer 4

in lamellae (destructive interference)

Question 5

how are collagen fibres organised in the sclera?

Answer 5

in swirls (fibres not uniform)

Question 6

is the cornea avascular?

Answer 6

yes

Question 7

what layer of the cornea if damages produces a scar?

Answer 7

layer 3, stromal

Question 8

What is the anterior chamber filled with?

Answer 8

Aqueous Humour

Question 9

at what site does the fluid exits the anterior chamber?

Answer 9

at the anterior angle

Question 10

what is the pathway for getting rid of the AHumour in the anterior chamber?

Answer 10

Trabecullar Meshwork - Canal of Schlemn (@anterior angle) - Venous System

Question 11

what are the main muscles of the iris?

Answer 11

Sphincter (Parasympa CN3)

Dilator (Sympa)

Question 12

MAin parts of the cilliary body?

Answer 12

Ciliary Muscle
Ciliary Epithelium
Ciliary Process

Question 13

What part of the ciliary body produces the aqueous humour?

Answer 13

the ciliary epithelium

Question 14

Accomodation of the lens due to —–1—- activity happens in order to see objects that are —-2— and causes relaxation of the —–3—- with —–4—- of the lens

Answer 14

1 Parasympathetic
2 Close
3 Zonules
4 Fattening

Question 15

What is presbyopia?

Answer 15

inability that develops with age to accomodate the lens of the eye because the capsule of it looses flexibility and alzo de zonules
requires (+) glasses

Question 16

Where does the main supply to the retina closer to the choroid come from?

Answer 16

the choriocapillaries

Question 17

the choriocapillaries is majorly supplied by the

Answer 17

posterior retinal arteries

Question 18

lamina cribosa is a mesh of collagen fibres that come from the sclera

Answer 18

T, if IOP increases might damage the optic fibres that become the optic nerve due to them having to pass through the holes of the mesh

Question 19

what is the foveal and what is it surrounded by

Answer 19

area of best visual acuity surrounded by the macula (no rods)

Question 20

the macula is highly vascularised T/F

Answer 20

F obtains nutrients from the choroid

Question 21

Blood supply of the eye comes mainly off

Answer 21

(Anterior, Short and long Posterior Ciliary Arteries) <– Internal Carotid Artery

Question 22

the long ciliary arteries supply mainly

Answer 22

the photoreceptors away from the optic nerve, the iris and the ciliary body (they travel between the sclera and the choroid)

Question 23

the anterior ciliary Arteries supplies mainly the

Answer 23

conjunctiva

Question 24

what are the main muscles of the eyelid?

Answer 24

Open: Levator Palpebrae Superioris (CN 3)
Close: Orbicularis Oculi (CN 7)