Oph Flashcards

(55 cards)

1
Q

Proptosis

A

> 21 mm
Adult - Hertel
Children - Luedde

McCoy - facial asymmetry

Manual
Nafzigger - head end
Worm - foot end

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2
Q

Diabetic retinopathy

A

Outer plexiform layer > Nerve fiber layer
Dot blot hemorrhages > flame hemorrhages
Hard exudates > soft exudates

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3
Q

Hypertensive retinopathy

A

Outer plexiform layer < Nerve fiber layer
Dot blot hemorrhages < flame hemorrhages
Hard exudates < soft exudates

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4
Q

Direct gonioscopes

A

Koeppe
Richardson
Swon Jacob

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5
Q

Indirect gonioscopes

A

Goldman
Ziess
Posner
Sussman

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6
Q

Glaucoma

A

Ganglion cell loss
First change - isopter contraction
Visual field defects correspond with optic nerve head changes
Static perimetry - Humphrey’s
Roenne nasal step - unequal contraction

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7
Q

Kinetic perimetry

A

Neurological disorders

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8
Q

First change in optic neuritis

A

Central scotoma/ centrocaecal scotoma

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9
Q

Marcus gunn pupil

A

Optic neuritis →
1. Retrobulbar neuritis - Multiple sclerosis
2. Papillitis - Vaccination
3. Neuroretinitis - cat scratch disease
MRI
IV steroids 1 g stat x 3 days f/b oral methyl prednisolone x 11 days

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10
Q

Splinter hemorrhage most commonly seen in

A

Normal tension glaucoma

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11
Q

Keratoconus

A

Fleischer ring - Fe in epithelium due to tear film stasis
Astigmatism
Munson sign
Curvatural myopia
Oil droplet reflex in DDO
Vogts stria - vertical stria in descemets
Scissoring reflex in retinoscopy

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12
Q

Habb striae

A

Horizontal
Congenital glaucoma

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13
Q

Buphthalmos

A

Watering
Photophobia
Blepharospasm
Big eyes
Axial myopia

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14
Q

↑episcleral venous pressure

A

Sturge Weber syndrome
Carotid cavernous fistula
Thyroid eye disease

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15
Q

MCC visual impairment in India

A

Untreated cataract
<50yrs - refractive error

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16
Q

MCC blindness in India

A

Untreated cataract
<50 yrs - corneal opacity
Childhood - vitamin Deficiency
Preventable blindness - cataract
Irreversible blindness - glaucoma

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17
Q

Reverse glaucoma

A

Reverse configuration of iris
Rubbing of zonules & iris after exercise, pigments released into anterior chamber
Pigments block trabecular mesh - pigmentary glaucoma
Pigments deposit on back of cornea - Krukenberg spindles
Transillumination defects in iris

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18
Q

Inverse glaucoma

A

Aqueous misdirection into virteous

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19
Q

Stickers line

A

Iron deposition in head of pterygium

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20
Q

Adies pupil

A

Doesn’t react to light but accommodates

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21
Q

Eye muscles movements

A

Superior are intorters
Inferior are extorters
Recti are adductors
Oblique are abductors

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22
Q

Retinoblastoma

A

13q14 - RB gene
Mc secondary tumor - osteosarcoma of neck of femur
Classical route of spread - optic nerve

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23
Q

Retinitis pigmentosa

A

Sporadic/ hereditary AD
Waxy disc pallor
AV attenuation
Bony spicule pigmentation

24
Q

Hutchinson triad

A

SNHL
notched teeth
Interstitial keratitis

25
Vogts triad
Seen in acute congestive glaucoma Glaucoma flakens - Anterior sublenticular opacity Iris atrophy Sphincter damage - vertical dilated pupil
26
Hutchinson sign
Vesicles on tip of the nose - predictor of corneal denervation in herpes zoster Pseudodendritic ulcer
27
Headlight in fog appearance
Chorioretinitis in toxoplasmosis
28
Mc site of coloboma
Iris - Inferionasal
29
Kayser fleisher ring
Copper deposition in peripheral cornea Wilson's disease - AR Reduces with response to therapy
30
Wiess ring
Posterior vitreous detachment C/o floaters
31
Attachments of vitreous
Ora serrata - strongest Macula Optic disc Superficial retinal vessels Posterior lens capsule - weigert's ligament
32
Only reversible cataract
Galactosemic cataract
33
Snellens chart
Visual acuity Form sense
34
ETDRS / LogMAR
Early treatment of Diabetic Retinopathy Study Scientific paper writing Amblyopia - crowding phenomenon - inability to read crowded letters
35
Pielli robinson chart
Contrast sensitivity
36
Mc ocular manifestation of covid
Follicular conjunctivitis
37
Papillary conjunctivitis
Allergy 2 types 1. Giant papillary conjunctivitis - contact lens users 2. Vernal kerato conjunctivitis - spring catarrh - summer - teenage boys - cobble stone papillae - maxwell lyon sign - shield ulcer
38
Maxwell lyon sign
Thick ropy discharge with eosinophils Build up of heat-enhanced fibrin on giant papillae. sign of vernal keratoconjunctivitis (VKC) Type 1 HSR + TYPE 4 HSR (1>4) T/t Olopatidine, sodium cromoglycate
39
Pituitary macroadenoma
>1cm Bitemporal hemianopia Earliest - Bitemporal superior quadrantopia - compression of infero nasal fibres from below
40
Anterior junction syndrome
Junctional scotoma I/L central scotoma + C/L superior temporal quadrantopia
41
Phacoemulsification incision length
2.8 to 3.2 cm
42
anterior capsule of lens stain
Trypan blue
43
Drugs causing anterior uveitis
Prostaglandin analogue (other a/e - trichomegaly, iris hyperchromia, periorbital hyperpigmentation) Parasympathomimetics
44
MOA of drugs in glaucoma
Mannitol - Desiccation of vitreous humour - reduces the bulk CA inhibitors and β blockers - ↓ aqueous production Prostaglandins - ↓ uveoscleral outflow
45
Mc intraorbital tumor
Malignant Children - rhabdomyosarcoma Adults - NHL Benign Children - Dermoid cyst Adults - Cavernous hemangioma
46
Mcc of proptosis
Adults - Thyroid eye disease Children - U/L - Orbital cellulitis B/L - Neuroblastoma
47
Mc intraocular tumor
Children - retinoblastoma Adults - choroidal melanoma
48
Mc lacrimal gland tumor
Overall & benign - Pleomorphic adenoma Malignant - Adenoid cystic carcinoma
49
Trachoma
Bulbar follicles in 1-9 yrs, >10% prevalence - SAFE strategy Surgery for trichiasis > entropion Antibiotics Facial hygiene Environmental sanitation
50
Orbital cellulitis
Poor oral hygiene → ethmoid sinusitis → lamina papyraceous → orbital cellulitis
51
Acute angle closure
Pain Colored halos Redness ↑IOP Diffuse corneal haze Shallow anterior chamber Pupil block Mid dilated pupil
52
Best disease
AD Egg yolk appearance - lipofuschin deposits in retinal pigment epithelium ↓Arden ratio
53
Arden ratio
Ratio of light peak to dark trough in EOG >2 - normal 1.5 - 2 - borderline <1.5 - abnormal
54
Posterior subcapsular cataract seen in
BSC Busulfan Blowers cataract - radiation Steroids Chloroquine
55
Anterior subcapsular cataract
ASC Amiodarone Au Sunflower cataract Shield cataract Chlorpromazine