Correspondence

Question 1

T/F: Correspondence has the largest impact on prognosis and management of a strabismic case?

Answer 1

True

Question 2

This is a condition in which stimulation of the two foveas gives rise to a common cortical visual direction.

Answer 2

Normal correspondence

Question 3

This is a condition in which the 2 foveas do not give rise to a common cortical visual direction.

Answer 3

Anomalous Correspondence

Question 4

What 3 conditions favor anomalous correspondence?

Answer 4

1. Age of onset
2. Magnitude of strab
3. Stability of strab

Question 5

T/F: AC only develops in strabismus that occurs early in childhood.

Answer 5

True

- earlier age of onset, greater chance for AC

Question 6

AC is more common in what magnitude of strabismus?

Answer 6

small and intermediate angles

- not common in large strabs

Question 7

This is the angle by which the visual axis of the deviating eye fails to intersect the target.

Answer 7

Objective angle of deviation

Question 8

This is the retinal point in the deviating eye which receives the image of object fixated foveally by nondeviating eye.

Answer 8

Point Z - zero measure point

Question 9

This is the retinal point in the deviating eye which gives rise to the same visual direction as the fovea in fixating eye.

Answer 9

Point A - associated point

• the point where AC px rewired their brain to use
• only uses when both eyes are open

Question 10

This is the angular separation between Point Z and Point A.

Answer 10

Subjective Angle of Dev

Question 11

This is the angular separation between the fovea of deviating eye and point in which corresponds to fovea of fixating eye.

Answer 11

Angle of Anomaly

Question 12

If you determine a (+) angle of anomaly, how are the foveal tags separated?

Answer 12

crossed separation of foveal tags

Question 13

If you determine a (-) angle of anomaly, how are the foveal tags separated?

Answer 13

uncross separation of foveal tags

Question 14

This type of AC is when the angle of anomaly = the objective angle. What would their W4D look like?

Answer 14

• Harmonious AC

- 4 dots

Question 15

This type of AC is when the angle of anomaly < objective angle. What would their W4D look like if not suppressing?

Answer 15

UHC

- report 5 dots, diplopia

Question 16

This type of AC is when angle of anomaly > objective angle. Often occurs after surgery in pxs who had AC.

Answer 16

Paradoxical Anomalous Correspondence Type I

Question 17

This type of AC is when the subjective angle is > than objective angle. Often after surgery

Answer 17

Paradoxical Anomalous Correspondence Type II

Question 18

Patient subjectively is ortho; with CT = 20Δ ET (

Answer 18

HAC

Question 19

Patient subjectively is 10pd ET; with CT = 20Δ ET (

Answer 19

A = 20 - 10 (obj - sub)
A = 10 (UHC)
Ang Anom < Obj. Ang

Question 20

Patient subjectively is 10XT; with CT = 20Δ ET (

Answer 20

A = 20 - (-10)
A = 30
A > O = PAC I

Question 21

Patient subjectively is 30XT; with CT = 20Δ ET (

Answer 21

PAC II

- subj. angle is larger than obj. angle

Question 22

CT = 20pd CRET
Bagolini = uncrossed diplopia; put 20pd in place, centered; no movement on UCT. What type of correspondence? What about EF?

Answer 22

Normal Correspondence

- EF does not mess up bagolini; binocular test

Question 23

CT = 20pd CRET
Bag = aligned, no movment on UCT

Answer 23

Harmonious AC

Question 24

CT =20 CRET

Bag = Eso, 10pd BO, movment on UCT. What type of correspondence?

Answer 24

UHC

- angle of anomaly < obj. angle

Question 25

CT = 20pd CRET
Bag = Exo, 5pd BI, movement on UCT.

Answer 25

PAC I

- angle of anomaly (25) > obj angle (20)

Question 26

CT = 20pd CRET
Bag = Eso, 30 pd BO, movement on UCT.

Answer 26

PAC II

- subj angle > obj. angle

Question 27

This tool indirectly determines <a></a>

Answer 27

Major amblyoscope

Question 28

This response on the amblyoscope is when the target jumps to the other side.

Answer 28

Horror Fusionis

Question 29

CT = 25pd BI
Sub = 30pd BI
What type of correspondence is this?

Answer 29

Pac II

Question 30

CT = 25pd BI
Sub = 30pd BI
EF = 5 pd temporal EF
What type of correspondence is this?

Answer 30

NC

Question 31

CT: 40 BO
Sub: 20 BO
What type of correspondence is this?

Answer 31

UHC

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Question 32

CT = 25pd BO
Sub = 40pd BO
EF = 5 nasal
True angle of deviation?
What type of correspondence?

Answer 32

• True angle of deviation = 30pd

- PAC II

Question 33

Which test directly measures the true angle of anomaly?

Answer 33

HBAIT

Question 34

Your patient has a 40Δ CRET with normal fixation. What do you expect to see on HBAIT if the patient
has HAC

Answer 34

A perfect cross

Question 35

If HB and AI are superimposed = ?

Answer 35

• suggests NC

Question 36

If HB and AI are not superimposed?

Answer 36

• suggest AC

Question 37

If HB is on fixation point

Answer 37

• suggest no EF

Question 38

If HB is not on fixation point

Answer 38

• Suggest EF

Question 39

Which theory states the AC is the cause of strabismus; not the result of strabismus?

Answer 39

Innate theory

Question 40

Which theory states that AC is an acquired sensory adaptation of the brain to strabismus? Most popular theory.

Answer 40

Sensory Theory

• NC becomes AC slowly over time
• goes from shallow to deep

Question 41

T/F: If AC is found under more dissociated conditions (like HBAIT) it’s more embedded and difficult to tx.

Answer 41

True

Question 42

This type of theory states there are registered and nonregistered movements that can cause AC.

Answer 42

Motor theory

Question 43

If a deviation is caused by a registered eye movement, it is what type of correspondence? nonregistered movements?

Answer 43

1. registered = HAC
2. nonregist = NC
3. reg/nonreg = UHAC