Visual Fields Flashcards
What is the visual pathway?
Eye -> Visual Cortex
What is the term called where area where vision is partially / reduced?
Scotoma
What is the term called where visual defect is on the same site as lesion?
Ipsilateral
What is the term called where visual defect is on opposite site as lesion?
Contralateral
What is the term called where it affects the same part of visual field of each eye? (L/R)
Homonymous
What is the term called where the complete half of visual has defect?
Hemianopia
What is the term called where quarter of visual field has defect?
Quadrantanopia
What is the central defect?
Central Defect
What is the Arcuate defect>
Arch defect
What is the monocular field of view?
150 degrees horizontal
60 degrees superior
50 degrees inferior
What is the binocular filed of view?
Central 120 degrees
What are some reasons for conducting a visual field?
Trauma
Ophthalmic Problems
Eye diseases
Systemic diseases
Manual Vs Automated Visual Fields :
Humphrey Field Analyzer
Automated
Manual Vs Automated Visual Fields :
Frequency Doubling Technology
Automated
Manual Vs Automated Visual Fields :
Confrontation
Manual
Manual Vs Automated Visual Fields :
Tangent Screen
Manual
Manual Vs Automated Visual Fields :
Octopus
Automated
Manual Vs Automated Visual Fields :
Goldmann
Manual
Manual Vs Automated Visual Fields :
Amsler Grid
Manual
Confrontation
Examiner faces patient
Kinetic or Static
Monitor Fixation
Quadrants
Tangent Screen
Black felt and concentric circles / radiating lines
Kinetic
Fixation Monitoring
Amsler Grid
Macular Assessment
Near
Static
Printable Amsler Grid
Goldmann Visual Field
Kinetic and Static
Present stimulus
Monitor Fixation
Humphrey Visual Field :
30-2
Central 30 degrees with type 2 test points
How many points for 30-2?
76
Humphrey Visual Field :
24-2
Central 24 degrees but does go out nasally
How many points for 24-2?
68 points
What is the full field 120 useful for?
Drivers test
Frequency Doubling Technology
- Referred to as FDT
- Flickering grating pattern
- High sensitivity
- Short testing time
- Does not require 20/20 acuity
What are the components of the Humphrey Visual field?
- Name and DOB
- Reliability indices
- Threshold values
- Greyscale map
- Numerical total deviation map
- Numerical pattern deviation map
- Total deviation probability map
- Probability symbols
- Glaucoma hemified test
- Visual field indices
- Gaze tracking
What are ocular conditions with VF defects?
Glaucoma Retinitis pigmentosa Pituitary Tumour Stroke Optic neuritis Optic disc drusen
