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Opthalmology > Dvt > Flashcards

Dvt Flashcards

(62 cards)

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1
Q

More the cornea power

A

More myopic axis more the steeper axis more cornea curvature

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2
Q

Spherical equilant

A

Take spherical power as its
1/2 the cylinder
Then add numerically

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3
Q

Phacoemulsification

A

Incision 2.75-3.2 mm,clear cornea>limbus

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4
Q

Hydrodessection(water under capsule)contra indicated in

A

Posterior polar catract

Njcleus drop into vitreous

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5
Q

Teating vision of children

A

Teller chart prferential acquitybtest

Visual evoked reaponsw

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6
Q

Glare at night

Eching pearl

A

Post subcapsularcataract
Posterior capsular opacification after cataract sx
Rx laser capsulotomy

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7
Q

High chance for Esophoria

A

Hypermetrops

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8
Q

Panda sign seen in

A

B/l periorbital edema with anterior cranial fossa fracture

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9
Q

First visula fiedlf defect in glaucomay

A

Paracentarak scotoma

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10
Q

ETDRs/Log MAR chart(early treatment of diabetic retinopathy study)

A

Done frome 4 m
Each line has 5 letters
Better for research /amblyopia

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11
Q

Pelli robson chart

A

Contrst chart

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12
Q

Farnsworth munsell 100 hue test

A

Test for colour visoon

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13
Q

Gold standard to see optic disc and macula(central retina)

A

Slit lamp biomicroscopu

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14
Q

Direct opthalmoscope

A

Diatnce need 25 cm
Normal —red reflex
Virtual erect image
Magnification+power of eye /4

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15
Q

Oil droplet reflex

A

Keratoconus

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16
Q

Oil globular refelx

A

Anterior lenticonus

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17
Q

Indirect opthalmoscopy/fundoscopy

A

Entire retina
Real inverted image
Magnification=power of eye/power of lens

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18
Q

Emmetropia

A

All rays fall on a songle point on retina

Far point -infinity

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19
Q

All rays fall behind the retina

A

Hypermetropia

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20
Q

Far point of myopia

A

Infront of eye

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21
Q

Diopter into meter

A

Far point =1/2 m
Eg-2D
1/2 m
100\2 =50 cm

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22
Q

Near vision/accomodation

A

Ciliary body contarcts
Zonules relaxanterior lens curvature increases
Converging

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23
Q

Who has more accomodation

A

Hypermeyrope accomodate more—esophoria

Myopes less accomodates—exophoria

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24
Q

Age and accomodation

A

With increase in age accomodation decreses and near point increases
Known as prebyopia

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25
Hydrodelination
Water inside lens fibres
26
IOL implantation best position
Posterior chamber
27
What happens to accomodation after cataract sx
Accomodation is lost
28
Management of congenital cataract
Lens aspiration+posterior capaulorhexia+anterior vitrectomy+IOL
29
Leucocoria
Most vommon cause of congenital catract After sx accomodation is lost Near glasses are neded
30
Post cataract ax complication
Shallow ac with high IOp Pupil block:glaucoma Iris bomBe
31
Shallow ac eg
Glaucoma Aquous misdirection syndrome/maligannat glaucoma Aupra choroidal hemorrhage
32
Post catract ax low iop
Wound leak | Aiedek tust positive
33
Retina fibres
Pappili macular bundle fibres—involved in optic neuropathies 2) radiating fibres—most resistant to glaucoma changes 3) arcuate fibres—bherrum area—most suceptible to glaucoma
34
Central scotomas
In optic neuropathies
35
Centro caecal scotoma
In optic neuropathy(tobacco,alcohol)
36
B/l enlargement of blind spot seen in
Papilledema
37
Altitudinal defects-one half of viaual field lost
Non arteritic optic neuropathy Glaucoma Inferior retinal vein ocllusion
38
Ring acotoma/tunnel vision
``` Retinitis pigmentisa Gyrate dystrophy Pan retinal photocoagulation Vigabatrin Quinine ```
39
Non specefic bu first change in glaucoma
Isoptre contarction /baring of blind spot
40
First defect in glaucoma
``` Paracentral scotoma—in bjerrum area Siedel scotoma-in bjerrum area Arcuate scotoma—bjerrum scotoma Double arcuate scotoma Roenne nasak step Advanced field defects ```
41
Right anopia
Rightvoptic nerve lesion
42
Bitemporal hemianopia
Optic chiasma lesion
43
Pityitary tumour frst defect
B/l superior temporal defect
44
Craniopharyngioma 1 st defect
Inferior twmporal defect
45
Left Homonymous hemianopia
Right optic tract lesion
46
Wernicke hemianopic pulpil
In optic tract lesions
47
Chiasmal defects and retrichiasmal
Chiasmal—heteronymous | Retrochiasmal—homonymous
48
Rightvhomonenmous auperior quadrant hemoanopiaq
Left temporal lobe lesion
49
Right occipital lobe lesion
Left hononykous hwmianopia with macular sparing(macula additional supply from kiddel cerebral artery)
50
Rapd(relative afferent puppillary defect)
Marcus gunn pupil Swinging flash light examination Left second nwrve compression or neuritis
51
Light near disaociation
Light refkex absentmaccomodation reflex present Argyll robertson pupil-pretectak nucleus Eg neurosyphilis
52
Holmes adie pupil
Lesion in ciliary ganglion Accomodation fibres are spared Dx and rx—diluted pilocarpine (0.125%)
53
Anisocoria
Different pupil size
54
Aniaocoria increases in bright ligh
Adie pupil 3 rd nerve palsy Damage to iris sphincter Pharmacological mydriaaua
55
Retinal detachment
Sepparation of inner 9 layers from | The 10 th layer
56
Rhegmatogeous
Retinal tear + liquified vitrous
57
Vitreo retinal sx
Comolete vitrectomy | Replace vitrous with air/SF6/C3F6 or silicone oil
58
Complication of silicon oil
Hyper oleon/inverted hypopyon
59
Ink blot/smoke stack in angiography
Central serous retinopathy
60
Flwer petal pattern
Cystoid macular edema
61
Microaneurysm
Mild NPDR
62
Cheery red spot
``` Ganglion layer edema CRAO Blunt trauma Neiman pick ds Faucher Gm1/gm2 ganglioside Tay sachs ds ```

Opthalmology (1 decks)

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