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FRCOphth > investigations > Flashcards

investigations Flashcards

1
Q

Lyonization examples

A

Choroideremia
X-linked ocular albinism
X-linked RP
Lowe syndrome
Fabry diseases

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2
Q

What stage of embryology does X linked

A

Blastocyst

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3
Q

Appearance of lyonization on autofluorescence?

A

mottled appearance

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4
Q

Vfd defect seen with leber or ADoptic neuropathy ?

A

Cecocenteral - developement of pits

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5
Q

Lyonisation

A

X linked recessive dont noramlly appear in female.
If lyonisation occurs
X chromosome cancelled - severe effects

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6
Q

Increased autofluorescence on FAF

A
  1. OD
  2. Active melanoma
  3. Active optic neuritis
  4. Increased in RPE metabolism
  5. Best vitelliform
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7
Q

Decreased autofluorescence on FAF

A
  1. Birdshot chorioretinpathy
  2. Inactive melanoma
  3. Inactive optic neuritis
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8
Q

Blind spot location

A

temporal optic nerve head
15 degree temporal
5 vertical and 7 degrees horizontal
2/3 down on horizontal line

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9
Q

Centeral vfd

A

Unilateral
Optic nerve pathology: compressive lesions, optic neuritis
Macular pathology: scarring, oedema, etc
Bilateral
Optic nerve pathology: toxic/nutritional
Macular pathology: scarring, oedema etc.

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10
Q

Arcuate vfd

A

Glaucoma
Anterior ischemic optic neuropathy
Branch retinal artery/vein occlusion
Optic nerve drusen

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11
Q

PSD more sensitive than in MD in what condition ?

A

Glaucoma

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12
Q

Altiduinal defect

A

Horizontal meridian
1. Optic neuritis

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13
Q

Causes of binasal scotoma

A

Cause of binasal defect
Glaucoma in most cases
Compression of the temporal optic nerve/chiasm
Internal carotid artery aneursym
Infarction

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14
Q

PSD or MD better at monitoring glaucoma ?

A

MD

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15
Q

Where is drusen deposited in age-related macular degeneration

A

Drusen is situated between the basement membrane of the RPE and the Bruch’s membran

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16
Q

Contraindication to ICG

A

Contraindications to ICG include:
pregnancy
seafood allergy
iodide allergy
kidney failure
liver disease
Contraindications to FFA include:
previous allergy to fluorescein
breastfeeding (fluorescein is excreted in breastmilk)
kidney failure
pregnancy (no serious adverse events reported but a relative contraindication)

17
Q

Contraindications to FFA

A

Contraindications to FFA include:
previous allergy to fluorescein
breastfeeding (fluorescein is excreted in breastmilk)
kidney failure
pregnancy (no serious adverse events reported but a relative contraindication)

18
Q

Scanning laser Ophthamology length and detects what component?

A

810nm
Component melanolupsin

19
Q

Fundua camera detects what

A

Infared length 410nm

20
Q
A

FRCOphth (8 decks)

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