2 - Big 6 of BV Exam

Question 1

For emmetropia screening, hold up +1.50 for working distance. If with motiom, hold up _; if against motion, hold up _

Answer 1

+2.00, -2.00

Question 2

Mayo Control Scale for XT is looking at how quickly a patient _ after being dissociated. Used to track progress when magnitude may not be decreasing, but recovery time does.

Answer 2

recovers

Question 3

gradient AC/A is done 2 ways?

Answer 3

flippers outside phoropter, Von Grafe inside phoropter

Question 4

Dr. Swan estimation for AC/A states that normal is _, anything greater than that is abnormal

Answer 4

5pd

Question 5

if near is relatively more exo than distance, AC/A is considered _
if near is relatively more eso than distance, AC/A is considered _

Answer 5

low, high

Question 6

when doing a CT in different positions of gaze, change gaze by _ degrees

Answer 6

25

Question 7

comitant vs noncomitant?

Answer 7

comitant - constant in all positions of gaze

noncomitant - phoria changes with changes in gaze (>5pd)

Question 8

kinetic cover test involves _

Answer 8

moving target towards and away from patient as you perform CT

Question 9

kinetic CT looks at how phoria changes as _ is elicited

Answer 9

an accommodative response

Question 10

with kinetic CT, more eso at near = _ AC/A

more exo at near = _ AC/A

Answer 10

high, low

Question 11

with kinetic cover test, should you quantify?

Answer 11

no - just observe more/less eso/exo

Question 12

with kinetic CT, move at ~_cm/sec

Answer 12

5

Question 13

forced vergence CT is comparable to _

Answer 13

delayed subjective refraction

Question 14

forced vergence CT is used to pull out _

Answer 14

latent deviations

Question 15

forced vergence CT involved adding _ and allowing for adaption (_ sec) until reversal

Answer 15

prism, 20 sec

Question 16

Is monocular or binocular the most pure and direct measure of amp of accommodation? Why?

Answer 16

monocular, because binocular tests convergence too

Question 17

Methods to test amplitude of accommodation? (3)

Answer 17

push up, pull away, minus to blur

Question 18

When doing minus to blur, amplitude is _

Answer 18

lenses cleared + test distance

Question 19

Hoffstetter’s formula for minimum and average amplitude of accommodation?

Answer 19

minimum: 15 - 0.25(age)
avg: 15 - 0.18(age)

Question 20

methods to test posture of accommodation? (3)

Answer 20

MEM, Nott, BCC/FCC

Question 21

Do MEM from _ distance

Answer 21

Harman’s distance (typical reading distance relative to your size)

Question 22

lag vs lead of accomm?

Answer 22

lag - behind (norm = +0.50D)

lead - in front of target

Question 23

Does a lead/tight accommodation show up when measuring amp of accommodation?

Answer 23

no

Question 24

For BCC
dial _ into phoropter
grid target in _ illumination

Answer 24

+0.50 OU

dim

Question 25

For BCC, is horizontal or vertical lines clearer?
horizontal add _
vertical add _

Answer 25

\+ = positive lag
- = lead

Question 26

When testing for accommodative facility, consider _ and test for how long?

Answer 26

suppression checks, 1 full minute

Question 27

suppression check for accommodative facility?

Answer 27

r/g bar readers and r/g glasses (Word Rock Card)

Question 28

when testing facility, ask patient to demonstrate clarity by _

Answer 28

reading a word

Question 29

How clinically significant are NRA/PRA? Why?

Answer 29

not very - binocular, so indirect measure of accommodation, vergence, AC/A influence

Question 30

Test vergence ranges:

smooth _, step _, jump _

Answer 30

risley prism, prism bar, big converging/diverging movements

Question 31

NPC should be measured once or multiple times?

Answer 31

multiple times, could break down with repeats

Question 32

accommodative vs nonaccommodative target for NPC

Answer 32

acc - push up E - should cause closer to nose
nonacc - transilluminator - should be further from nose
document which one you use!!

Question 33

oculomotor skills to assess _ _ _

Answer 33

fixation, saccades, pursuits

Question 34

test fusion with _, describe which 3 things?

Answer 34

worth 4 dot - depth, size, eye

Question 35

worth 4 dot:

size:

Answer 35

close: larger (peripheral)
far: smaller (central)

Question 36

worth 4 dot:

depth:

Answer 36

if present in dark, more intense scotoma

Question 37

local stereopsis includes: _, _

Answer 37

contours, monocular cues

Question 38

global stereopsis requires _

Answer 38

bifoveal, no monocular cues

Question 39

absence of fusion is _

Answer 39

suppression

Question 40

big 6 of BV?

Answer 40

Refractive Error, Phoria, Accommodation, Vergence, Oculmotor Skills, Fusion