Vision Disorders. 10/10

Question 1

Cornea appearance

Answer 1

Transparent

Question 2

what causes corneal ulcers

Answer 2

infection/injury/rubbing/lenses

Question 3

what is a corneal ulcer

Answer 3

disorganised tissue

Question 4

why must cornea be transparent

Answer 4

window to let light through

Question 5

whats the cornea made of

Answer 5

collagen

Question 6

what can scar cornea

Answer 6

abrasion

Question 7

iris main function

Answer 7

regulate light entering the eye and stops glare

Question 8

iris disorders can lead to

Answer 8

glare/difficulty seeing in dim light

Question 9

when iris partially/completely missing from birth (name)

Answer 9

aniridia

Question 10

most common lens disorder

Answer 10

cataract

Question 11

why happens to lens with cataracts and what does it cause

Answer 11

lens becomes opaque
blur/glare

Question 12

what leads to presbyopia

Answer 12

lens flexibility decreases with age

Question 13

how many layers of retina are there

Answer 13

11 layers

Question 14

what’s the biggest sign of retinal issue

Answer 14

patient reports distortion

Question 15

common retinal disorders

Answer 15

macular degeneration, retinal detachment, retinoblastoma

Question 16

what does curtained vision suggest

Answer 16

retinal detachment

Question 17

cause of diabetic/hypertensive retinopathy, retinal vein/artery occlusion

Answer 17

disruption of blood supply to the retina

Question 18

diabetic retinopathy symptom

Answer 18

initially none
bleeds can cause scotomas

Question 19

hypertensive retinopathy symptoms

Answer 19

often none
blur

Question 20

retinal vein/artery occlusion symptoms

Answer 20

sudden vision loss

Question 21

what is glaucoma and why does it occur

Answer 21

group of disorders characterised by optic nerve damage due to high pressure in the brain

Question 22

why does papilloedema happen

Answer 22

high pressure in the brain

Question 23

symptom of papilloedema

Answer 23

blur, scotoma, headache

Question 24

why does optic neuritis happen and whats the main symptom

Answer 24

inflammation (usually) due to demyelinating disease
sudden vision loss

Question 25

how many eye muscles are there

Answer 25

6 on each side

Question 26

3 main reasons eye muscles tend not to work properly

Answer 26

nerve problems
generalised muscle weakness
trauma

Question 27

what is heterotropia

Answer 27

simple eye turns

Question 28

what can happen if heterotopia is longlasting

Answer 28

may be no double vision
poor vision may develop in 1 eye through lack of use

Question 29

why don’t children with heterutopia report double vision

Answer 29

brain switches off 1eye

Question 30

what contributes to refractive error

Answer 30

eye size
corneal shape
lens shape

Question 31

besides eye size what can effect focal point

Answer 31

corneal/lens shape

Question 32

what happens if brain damage to primary visual cortex

Answer 32

scotoma
specific vision losses

Question 33

what can happen if damage to high visual areas

Answer 33

cant focus on two objects at once