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Sample MCQs > Blue 1 > Flashcards

Blue 1 Flashcards

1
Q

Which way does the lacrimal orbicularis oculi draw the eyelids and papillae

A

Medially to such tears into the lacrimal punctum

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2
Q

What blood supply to the peripheral cornea?

A

Oxygen diffusion from anterior ciliary blood vessels

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3
Q

How long does corneal epithelial turnover take

A

7 days

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4
Q

What are type A muscle fibres for? Type B/

A

A - sAccAdic eye movements

B - smooth Bursuit, smaller diameter

Type C align visual axes with fine contractions

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5
Q

What day can lens placode by identified?

A

27

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6
Q

What is thickness of pre-corneal tear film

A

3.4um

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7
Q

What is the layers seenin gonioscopy posterior to anteiror

A

I Cant See This PermaNent Stuff

Iris
Ciliary body
Scleral spur
Trabecular meshwork (pigmented then non-pigmented)
Schwalbe’s line

Schoi line (pigment anterior to schwalbe’s line in pigment disperison

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8
Q

What is the path of the unconventional outflow aqueous

A

Iris root uveual meshwork
Ciliary muscle
Suprachoroidal space
Sclera

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9
Q

What is the path of the conventional outflow of aqueous

A

Trabecular meshwork
Schlemm’s canal
Ascher veins - aqueous veins
Episcleral venoous plexus

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10
Q

What is resting potential of dark adapted rod cell

A
  • 40 mV
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11
Q

What does Bloch’s law state

A

Monotonic increase in perceived contrast with increased duration - intensity of threshold stimulus is inversely proportional to duration

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12
Q

genes for different colour vision defects

A

OPN1SW - blue (short wavelegth opsin)tritan defect

OPN1MW - green (mid wavelegth opsin) deutran defect

OPN1LW - red (long wavelegnth opsin) protan defect

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13
Q

What part of the vtreous body has highest concenrtation of hyaluronan and colalgen

A

Cortex

Lower in centre - in centre there is only hyaluronan

In cortex there is chondroitin and heparan

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14
Q

What does cataract cause wrt absorption of light

A

Accumulation of yellow pigments causes increased absorption of blue light

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15
Q

stain for conreal dystrophy

A

Macular - mucopoysaccharide - alcacin blue

Granular - hyaline - mason trichrome (red)

Lattice - Amyloid - Congo red

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16
Q

What % of white cells are neurtrophils

A

25%

17
Q

NAtural tear volume

A

7-8uL

18
Q

What is infliximab

A

Chimeric monoclonal antibody (not human)

19
Q

What happens to pH of local anaesthetic with adrenaline?

A

MAde more acidic

20
Q

What residue to local anaesthetics have?

A

Aromatic residue - this is hydrophobic
Amide group is hydrophilic

21
Q

What is candidate gene analysis

A

Identify genes specifically expressed or those known to code for important proteins in the tissue in question

22
Q

Pie in sky/pie on floor

A

PITS

Parietal lobe lesion - pie on floor

Temporal lobe lesion - pie in sky

23
Q

What is manifest devision?

A

Tropia
Deviation is always present
Cover test

24
Q

What does uncover test reveal

A

Latent deviation
Phoria

25
Q

What can perform ekratometry

A

Corneal topographyer
Autorefractor
IOL master

26
Q

ICG peaks

A

Excitation 810
Emission 830

98% protein bound in serum

27
Q

Axial resolution of ocular US

A

150uM

Transverse resolution 450uM

28
Q

Positive defection in prVEP

A

N70
P100
N135

29
Q

Defections in pattern ERG

A

N35
P50 - cones
N95 - ganglion cells

30
Q

What happens in albinism on prVEP

A

Transoccipital crossed asymmetry where VEP is largest on one hemisphere for right eye and other hemisphere for left eye

31
Q

What is p value

A

Probability of obtaining data or data more extreme due to chance if null hypothesis is true

32
Q

CONSORT
STROBE
STARD
PRISMA

A

conspRT - RCT
strObe - Observational study
starD - diagnostic accuracy
priSMA - systematic review/meta-analyses

Sample MCQs (20 decks)

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