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Glaucoma > Procedures > Flashcards

Procedures Flashcards

1
Q

AC lens placement

A

LPI at 12

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2
Q

LPI at 6 - when

A

DSEK/DMEK, silicone oil

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3
Q

ALT - parameters

A

0.1s duration. 50 micron spot. 300-1000 mW power

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4
Q

Gonioscopy - what distinguishes

A

appositional vs synechial vs plateau angle closure

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5
Q

Which lens can be used to measure the optic disc diameter with a slit beam by directly reading off the slit-lamp scale?

A

Volk Super 66

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6
Q

Which structure is the most tolerated in terms of touching the endothelium?

A

Iris

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7
Q

Goldmann aplanation after scleral buckle - higher, lower or the same

A

inaccurately low (reduced ocular rigidity)

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8
Q

Goldmann aplanation ain scleral scar - higher, lower or the same

A

inaccurately high

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9
Q

Goldmann aplanation in corneal edema - higher, lower or the same

A

inaccurately low

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10
Q

Goldmann aplanation in soft contact lens - higher, lower or the same

A

inaccurately low

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11
Q

What is the threshold pupil diameter below which generalized depression artifacts may occur?

A

2.5mm

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12
Q

Which location is associated with the highest frequency of bleb-related infections after trabeculectomy?

A

inferior

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13
Q

size 0 target - area

A

1/16mm2

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14
Q

size I target - area

A

1/4mm2

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15
Q

size II target - area

A

1mm2

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16
Q

size III target - area

A

4mm2

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17
Q

size IV target - area

A

16mm2

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18
Q

size V target - area

A

64mm2

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19
Q

Conditions with high likelihood of trabeculectomy failure

A

younger age, uveitic glaucoma, neovascular glaucoma, aphakic galucoma, chemical burns, scarred conjuctiva

20
Q

TSCPC - settings

A

17-19 applications. 270 degrees. power 1.5-2.0 W. duration 2 seconds

21
Q

Indirect gonio lenses

A

Goldmann, Posner, Zeiss

22
Q

Direct gonio lenses

A

Koeppe

23
Q

Laser trabeculoplasty - effectiveness at 1 year and 10 years

A

80%, 30%

24
Q

How to better visualize the nerve fiber later

A

red-free filter on the direct ophthalmoscope

25
Q

narrow in Van Herick

A

distance between anterior iris and posterior cornea is 1/4 or less of the corneal thickness

26
Q

Argon laser iridoplasty - parameters

A

0.1-0.5s. duration; 200-500 micron spot size; 200-500 mW power

27
Q

YAG LPI - parameters

A

start with 1.0 mJ

28
Q

Selective laser trabeculoplasty - parameters

A

3 ns duration; 400 micron spot size; 0.4-1.0 mJ power

29
Q

Humphrey 30-2 and 24-2 programs - points how many degrees apart

A

6 degrees

30
Q

What measures absolute RNFL thickness

A

HRT, OCT

31
Q

What measures relative RNFL thickness

A

scanning laser polarimetry (GDx)

32
Q

HRT =

A

confocal scanning laser ophthalmoscopy

33
Q

GDx =

A

scanning laser polarimetry

34
Q

Which method takes advantage of the nerve fiber layer’s natural birefringence?

A

scanning laser polarimetry (GDx)

35
Q

antifibrotic agents are effective in…

A

filtering procedures (NOT effective in drainage implants)

36
Q

antifibrotic agents increase risk of…

A

blebitis/endophthalmitis, hypotony maculopathy

37
Q

Fornix-based trabeculectomy

A

at the limbus, technically easier, risk of wound leak. lower, more diffuse blebs, fluid posterior

38
Q

Limbal-based trabeculectomy

A

incision 8-10mm posterior to the limbus (fornix), technically more difficult. bleb more focal and elevated. less prone to leaks

39
Q

What is the most common complication after trabeculectomy?

A

cataract

40
Q

Valved shunts

A

Krupin, Ahmed

41
Q

Non-Valved shunts

A

BMW: Baerveldt, Molteno, Wthout valve

42
Q

Glaucoma after scleral buckle - features

A

may choroidal effusion and anterior rotation of the ciliary body. flattening of peripheral iris with relatively deep central AC. blood in Schlemm’s canal (increased EVP), LPI not effective –> adjust or release tension of the scleral buckle

43
Q

Glaucoma after panretinal photocoagulation (PRP) - mechanism

A

ciliary body become thickened and rotated anteriorly

44
Q

unique complication of ECP compared to TSCPC

A

endophthalmitis, sympathetic ophtalmia

45
Q

SLT in PEX

A

effective, less power needed, shorter effect, more post laser IOP spikes

Glaucoma (7 decks)

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