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Neurology 1 > Physiology - Vision 1 > Flashcards

Physiology - Vision 1 Flashcards

1
Q

the sclera allows attachment of which muscles

a.intraocular
b.extraocular
c.cilliary

A

b.extraocular

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2
Q

long lasting eye disorder that causes blurred vision or a blind spot in central vision , caused by blood vessels leaking into the macula

a.wet macula degeneration
b.acute glaucoma
c.chronic glaucoma
d.horners syndrome
e.cataracts

A

a.wet macula degeneration

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3
Q

myopia

a.short sightedness
b.long sightedness

A

a.short sightedness

cant see far away things

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4
Q

hypermetropia

a.short sightedness
b.long sightedness

A

b.long sightedness

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5
Q

cornea shaped more like a rugby ball than a football

a.wet macula degeneration
b.acute glaucoma
c.chronic glaucoma
d.horners syndrome
e.cataracts
f.astigmatism

A

f.astigmatism

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6
Q

what happens to the cornea during any corneal pathology

A

goes cloudy
one function is to stay clear

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7
Q

where does the most refraction of light occur

a.lens
b.cornea
c.sclera
d.retina
e.pupil

A

b.cornea

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8
Q

which layer of the cornea gives strength and protection

a.epithelium
b.bowmans layer
c.stroma
d.descemets membrane
e.endothelial

A

b.bowmans layer

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9
Q

which layer of the cornea maintains transparency

a.epithelium
b.bowmans layer
c.stroma
d.descemets membrane
e.endothelial

A

c.stroma

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10
Q

which layer of the cornea maintains the endothelial cells

a.epithelium
b.bowmans layer
c.stroma
d.descemets membrane
e.endothelial

A

d.descemets membrane

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11
Q

what colour does the fluorescent orange drip show under blue light when a corneal abrasion is present

a.orange
b.red
c.pink
d.blue
e.green

A

e.green

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12
Q

which muscle constricts the pupil

a.sphincter pupillae
b.dilator pupillae
c.cilliary muscles

A

a.sphincter pupillae

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13
Q

which muscle relaxes the pupil

a.sphincter pupillae
b.dilator pupillae
c.cilliary muscles

A

b.dilator pupillae

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14
Q

the sphincter pupillae is supplied by which system

a.parasymathetic
b.sympathetic

A

a.parasymathetic

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15
Q

the dilator pupillae is supplied by which system

a.parasymathetic
b.sympathetic

A

b.sympathetic

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16
Q

In Horners syndrome the pupils are abnormally small this is due to an interruption in which supply to the eye

a.blood
b.sympathetic
c.parasymathetic
d.nervous

A

b.sympathetic

interruption in symp supply which would normally enlarge pupil

so unopposed parasympathetic supply and pupils are small

can occur due to different events eg roller coasters/ hyperextension of neck at hairdressers

17
Q

what determines eye pressure

a.aqueous humour
b.vitreous humour

A

a.aqueous humour

18
Q

which part of the eye if filled with aqueous humour

a.anterior to lens
b.posterior lens

A

a.anterior to lens

19
Q

what is the correct route for flow of aqueous humor?

A

produced cilliary bodies
lens-iris gap
out through pupil
iris- cornea gap
trabecular network

20
Q

where does the blockage of aqueous humor flow occur in acute glaucoma

a.iris and lens
b.iris and cornea
c.cornea and lens
d.trabeculum

A

a.iris and lens

eye runs out of room

21
Q

old age and hypermetropia are risk factors for what

a.wet macula degeneration
b.acute glaucoma
c.chronic glaucoma
d.horners syndrome
e.cataracts
f.astigmatism

A

b.acute glaucoma

old age makes lens bigger
hypermetropia - long sighted light bought to focus behind eye so eye too small and pressure builds easier

22
Q

which of these is a risk factor for acute glaucoma along with old age

a.myopia
b.astigmatism
c.cataracts
d.horners syndrome
e. hypermetropia

A

e. hypermetropia

eye too small so pressure builds quicker

23
Q

where does the resistance to flow occur in chronic glaucoma

a.iris and lens
b.iris and cornea
c.cornea and lens
d.trabeculum

A

d.trabeculum

risk factors - diabetes and steroids

24
Q

which drug type increase the risk of chronic glaucoma

a.antibitoics
b.steroids
c.antihistamines
d.diuretics
e.beta blockers

A

b.steroids

25
Q

diabetes and steroids are risk factors for which eye condition

a.wet macula degeneration
b.acute glaucoma
c.chronic glaucoma
d.horners syndrome
e.cataracts
f.astigmatism

A

c.chronic glaucoma

26
Q

imbalance between rate of production and drainage of aqueous humor causing raised intraocular pressure

A

glaucoma

27
Q

age related reduction in ability to accommodate
mainly due to lens stiffness

A

presbyopia

28
Q

flashers seen is caused by what collapsing in on itself and pulling on the retina

a.cornea
b.iris
c.lens
d.vitreous
e.aqueous

A

d.vitreous

29
Q

floaters seen are caused by wisps of condensed………….. floating around the eye creating shadows

a.aqueous
b.vitreous

A

b.vitreous

30
Q

what should be done for patient with flashers and floaters?

a.nothing
b.bought into gp
c.sent to a and e

A

b.bought into gp

vitreous can pull enough to tear retina causing retinal detachment

Neurology 1 (44 decks)

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