Motor/Sensory Fusion Testing Flashcards
Where do the EOM’s form from in development? When does the muscle cone form? When do the nerves from the brain go to the muscle?
Mesoderm
5-7 weeks of gestation
1 month
What EOM testing technique is not used when testing EOM’s for pediatrics?
Pursuits
How do you test EOM’s for pediatrics?
Have patient follow target in a pattern. May have to turn an inflants/toddlers head (Doll’s Head).
What is “ Doll’s Head” technique and what does it test?
Test for EOM. Doc moves baby’s head while the baby focuses on object.
What do you look for when doing motilities?
restrictions or overactions
When does convergence develop for full-term babies?
Convergence is able to happen at 1 month.
Not consistent until 2 months.
Not without delay until 3 months.
When doing near-point convergence, what do you look for when doing it on pediatric patients?
Record when patient reports break and recovery OR watch when the patient suppresses.
When is a normal break and recovery for near point of convergence?
5cm/7cm
When is an abnormal break and recovery for near point of convergence?
Break at 6cm or greater
What is the Modified Thorington test?
Similar to Von Grafe test.
It is a subjective measurement of binocularity. Done in free space and does not require a phoropter. Very repeatable and may be easier to understand for kids. Done at dist and near.
What do you need in order to perform Modified Thorington test?
Maddox Rod
Penlight
Thorington card
What eye do you usually put the maddox rod on when doing Modified Thorington tetsing?
Right eye
What will the patient see when performing Modified Thorington test?
A red line that passes through number line.
On modified thorington test, if patient sees red line on the left of 0, what would the patient be?
Exo “Crossed”
On modified thorington test, if patient sees red line on the right of 0, what would the patient be?
Eso “uncrossed”
On modified thorington test, if patient sees red line above 0, what would the patient be?
R Hypo
On modified thorington test, if patient sees red line above 0, what would the patient be?
R Hyper
What are normal values for Von Graefe and Modified Thorington?
Distance: 1 exo
Near: 3 exo
Vertical: 0 iso
Tests of Motor Fusion (6)
1) Hirschberg
2) Krimsky
3) Bruckner
4) Cover Test/ Unilateral/alternative
5) Near point of convergence
6) VG/MT Phoria
Hirschberg Test
Distance:
Procedure:
Results:
Ideal outcome
Distance: 50 cm
Procedure: Transilluminator
Results: look at displacement of reflex
If 1 mm displacement, equals 22 prism diopters?
Krimsky
Distance:
Procedure:
Results:
Ideal outcome
Distance: 50 cm
Procedure: Transilluminator with prism
Results: When reflex is symmetrical
Bruckner
Distance:
Procedure:
Results:
Ideal outcome
Distance: 1 meter
Procedure: Direct Ophthalmoscope
Results: Displacement of reflex, color of media
-Includes Hirschberg
Cover Test/unilateral/ alternate
Distance:
Procedure:
Results:
Ideal outcome
Distance: 16’’, 10’ , 20’
Procedure: UCT then ACT Multiple fields of gaze
Results: phoria vs tropia
Ideal outcome: 0-3XP 0-6XP’
Near Point convergence
Distance:
Procedure:
Results:
Ideal outcome
Distance:Target from 16 inches to the nose
Procedure: Keep target clear, tell me when double
Results: Record break/recovery or when you see supression
Ideal outcome: 5-7cm
VG/MT Phoria
Distance:
Procedure:
Results:
Ideal outcome
Distance: 16’’ or 20’
Procedure: Align Risley prism;
Maddox Rod with card & transilluminator
Results: Aligned vertical/horizontal; Line going through number
Ideal outcome: 1 exo distance
3 exo near
0 iso
How do you do “step vergences”? What do you tell the patient? How do you get results?
Use prism bar.
“Tell me when the target gets double and then single”
Results by observing objective eye movements