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Neet Pg > Ophthal > Flashcards

Ophthal Flashcards

1
Q

Eyeball shape

A

Ablate spheroid

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2
Q

Vitreous humour contains

A

Hyaluronic acid and collagen bundles

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3
Q

Presence of primary vitreous after birth

A

Persistent hyperplastic primary vitreous
Leukocoria

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4
Q

Dimensions of eyeball? Vertical horizontal AP.

A

23, 23.5, 24

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5
Q

Volume weight circumference of eyeball

A

6.5 ML, 7 g, 7.5 cm

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6
Q

Hypermetropia at birth gets corrected by

A

5 to 7 years

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7
Q

Reflexes seen in eyes of children

A

Fixation reflex – 2 to 4 months.
Macular differentiation – 4 to 6 months
Stereopsis (3-D vision) – appear at 6 to 8 months
Completes by 5 to 7 years.

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8
Q

Gene associated with development of eye

A

PAX6 gene

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9
Q

Sclera develops from

A
  1. Temporal part– mesoderm
  2. other parts – mesenchymal part of neural crest
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10
Q

Thickest basement membrane in the body

A

Lens capsule

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11
Q

Antioxidant vitamins

A

Vitamin B,C and E
Precursor of vitamin A – beta carotenoids

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12
Q

Antioxidant enzymes in the eye

A

Catalase
Superoxide dismutase
Glutathione peroxidase

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13
Q

MIP 26 is associated with

A

Transparency of lens

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14
Q

Maximum diminution of vision is seen in which type of cataract?

A

Posterior sub capsular

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15
Q

Which cataract shows onion peel appearance

A

Posterior polar

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16
Q

Nuclear cataract

A

Nuclear sclerosis
Hard cataract
Progressive index myopia
second sight

17
Q

Cortical cataract

A

Over hydration
Hypermetropia
Frequent change of power of glasses

18
Q

Cuneiform vs cupuliform cataract

A

Cuneiform– peripheral opacities, night blindness
Cupuliform – central opacities , day blindness

19
Q

Classical signs in stages of cortical cataract

A

A)Stage of lamellar separation – glare
B)Early incipient cataract –( inferonasal quadrant) ,uniocular polyopia
C)Immature senile cataract-Iris shadow, coloured halos (phacomorphic glaucoma)
D)Mature senile cataract– GPP DOV;
E)Hyper mature, senile cataract
1) mortgagni - nucleus at bottom ,phacolytic glaucoma , phacogenic uveitis
2) sclerotic- wrinkled capsule ,phacodonesis (ant seg-phacotopic glaucoma), iridodonesis

Neet Pg (1 decks)

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