Diplopia (F) Flashcards
What is the awareness of seeing the same object in two different locations in visual space called?
diplopia
What are the tests for sensory fusion?
- Worth 4 Dot
2. stereoacuity
What is the way to properly record a patient with a constant vertical deviation with exotropia?
CRXT with CRHypertropia
What is the amount of movement in degrees possible in abduction? 1. Adduction? 2. Infraduction? 3. Supraduction? 4
- 50deg
- 50deg
- 45deg
- 40deg (decreases with age)
What is the status of comitancy that has a magnitude of deviation that stays the same in different positions of gaze? 1. What are examples of when this would occur? 2
- comitant
2. childhood strabismus
What are the possible management options for diplopia?
- imaging and referral for underlying pathology
- Fresnel prisms
- patching
- Bangerter foils
- ground in prism
- strabismus surgery
- botox
- orthoptic therapy
What are signs of restrictive disease due to trauma? 1. What is the treatment? 2
- lid edema, hematomas
2. monitor 6 months, surgery
What are the potential clinical testing methods for diplopia?
- Maddox rod
- red lens/Hess Lancaster test of comitancy
- double Maddox rod
- forced duction test
- ocular health check
- confrontations/VF test
- fusion testing
- other cranial nerve testing
- saccadic/pursuit evaluation
What is the status of comitancy that has a magnitude of deviation that changes in different positions of gaze? 1. What are examples of when this would occur? 2
- incomitant
2. cranial nerve palsies, restrictive disease, myasthenia gravis
What are the tests for retinal correspondence?
- synoptophore/troposcope/major amblyoscope
2. Bagolini lenses
What are the steps to Parks procedure?
- Which eye is hyper eye in primary gaze?
- Hyper greater in left or right gaze?
- hyper greater in left or right head tilt?
What are the possible indicators of cranial nerve V involvement? 1. CN VII? 2. CN VIII? 3
- check facial sensation
- check facial movement
- check for hearing loss
What are the steps in the red lens test?
- how many lights?
- location of red light relative to white light?
- look at light in all positions of gaze
- determine area of greatest separation
- paretic/involved eye will see image farther away
What is the angle in which the involved eye fixates/prisms over the sound eye?
secondary angle
What is the angle in which the sound eye fixates/prisms over the involved eye?
primary angle
