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II. Advanced Ocular Technique > Peri-Operative Cataract and Visual Fields (M4) > Flashcards

Peri-Operative Cataract and Visual Fields (M4) Flashcards

1
Q

What are the visual acuities associated with LOCS III trace-grade 1 nuclear cataract? 1. Grade 1+-2-? 2. Grade 2-2+? 3. Grade 3? 4. Grade 4? 5

A
  1. 20/20 to 20/25
  2. 20/30 to 20/40
  3. 20/50 to 20/60
  4. 20/70 to 20/100
  5. 20/100 or worse
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2
Q

What are the visual acuities associated with LOCS III trace-grade 1 cortical cataract? 1. Grade 2-2+? 2. Grade 2+-3? 3. Grade 4? 4.

A
  1. 20/20
  2. 20/25
  3. 20/30 to 20/40
  4. 20/60 or worse
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3
Q

What are the visual acuities associated with LOCS III grade 1 posterior subcapsular cataract? 1. Grade 2–2? 2. Grade 2+? 3. Grade 3? 4. Grade 4? 5

A
  1. 20/25
  2. 20/25 to 20/40
  3. 20/30 to 20/60
  4. 20/70 to 20/100
  5. 20/200 or worse
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4
Q

What is the purpose of pre-operative cataract testing?

A

indicates if surgery will improve overall visual function

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5
Q

What is the purpose of the potential acuity meter (PAM)?

A

assess retinal acuity through mild to moderate media opacification

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6
Q

What is the equipment used for PAM?

A
  1. PAM
  2. slit lamp
  3. possibly mydriatic
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7
Q

What does the narrow beam in the PAM result in?

A

reduced scatter

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8
Q

What is the dioptric range of the PAM?

A

-10D to +13D

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9
Q

What is the procedure for potential acuity pinhole (super pinhole)?

A
  1. pinhole one eye and occlude other
  2. place near acuity card at 40cm
  3. illuminate specific line and identify
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10
Q

What does the transilluminator do for super pinhole?

A

helps compensate for loss of retinal illumination from pinhole

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11
Q

What is the problem with the clinical interferometer?

A

lots of false positives (don’t really have problems)

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12
Q

What should be the starting point for the clinical interferometer?

A

2 lines worse than patients best corrected

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13
Q

What is it called when the predicted VA is worse than the final VA? 1. What is it associated with? 2

A
  1. false neagtive

2. dense opacities

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14
Q

What is it called when the predicted VA is better than the final VA? 1. What is it associated with? 2

A
  1. false positive

2. maculopathy

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15
Q

What do third party insurers need to have to cover cataract surgery coverage?

A

20/40 or worse on glare testing

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16
Q

What is the common glare testing device?

A

BAT (brightness acuity tester)

17
Q

What is the low illumination level of the BAT similar to environmentally? 1. Medium? 2. High? 3

A
  1. indoor fluorescent lighting
  2. indirect sunlight/ cloudy day
  3. direct overhead sunlight
18
Q

Should the eye be dilated for BAT testing?

A

no

19
Q

What can be used instead of the BAT that is probably just as accurate and more repeatable?

A

low contrast Bailey-Lovie chart

20
Q

What is the purpose of the macular photostress recovery test? 1. What test is this similar to? 2

A
  1. measure the return of visual function of the macula following exposure to a bright stimulus
  2. ERG
21
Q

What does the macular photostress recovery test differentiate?

A

retinal disease from ON disease (conduction deficit not affected)

22
Q

What are normal values for the macular photostress recovery test? 1. Abnormal? 2

A
  1. under 60sec

2. over 90 sec

23
Q

What disease will show a decreased brightness comparison test?

A

optic nerve disease

24
Q

What is a subjective observation of retinal vascular function tool?

A

entoptoscope

25
Q

What is the procedures performed peri-opertively cataract surgery?

A
  1. seidel test
  2. suture cutting (6 weeks out)
  3. wound burping
26
Q

What are the incisions during cataract surgery (purpose of them)?

A
  1. main wound (get materials in/out the eye)

2. paracentesis (avoid IOP spike)

27
Q

What is the purpose of wound burping?

A

momentarily open the paracentesis wound and allow aqueous to escape, dramatically decreasing IOP

28
Q

How many minutes each is a full threshold VF?

A

13+ minutes

29
Q

Are -1 or -2 VF tests along the midline?

A

-1

30
Q

What is the feedback from a VF that gives the threshold (dB) values for all points tested?

A

numerical

31
Q

What is the feedback from a VF that gives the sensitivity in tones of grey?

A

greyscale

32
Q

What is the feedback from a VF that gives the deviation from age matched normals?

A

total deviation

33
Q

What is the feedback from a VF that gives the deviation from age matched normals and adjusts for general reductions due to lens opacities or miosis?

A

pattern deviation

34
Q

What is the feedback from a VF that gives the significance of the defect?

A

probability values

35
Q

What is the feedback from a VF that gives the steadiness of gaze, false positives, or false negatives?

A

reliability indices

36
Q

What are the different global indices on a VF?

A
  1. mean deviation
  2. pattern standard deviation
  3. glaucoma hemifield test
37
Q

What are the rules for manually calculating a trial lens for the VF?

A
  1. for pt’s with +1.00D or less cyl determine spherical equivalent and add +3.00
  2. for pt’s with +1.25D or more cyl keep cyl the same and add +3.00D

II. Advanced Ocular Technique (9 decks)

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