1. RETINOTOPIC MAP:

2. Perimetric testing to Diagnose field defects
View from above
Perimetric testing to Diagnose
field defects

3. Each eye’s field of View (visual field) is mapped out
Can light be detected
throughout the
visual field?

5. Perimetric Map shows lower right
quadrant blindness (quadrantanopsia) in both eyes

6. Hemianopia
Deficit in 1/2 VF (homonymous: both eyes)

7. Scotoma
field defect within a quadrant

8. Quadrantanopsia
defect affects 1/4 VF

9. Gordon Holmes (1919)
maps the visual field
onto primary visual
cortex creating an
early look at the
Retinotopic map.

10. Gordon Holmes (1919) - original retinotopic map:
Correlated Visual Field Defects with lesion locus
Features of Map:
Crossed organization
Left 17 --> RVF
Right 17 --> LVF
Fovea: Disproportional representation
cortical magnification
Inverted organization
Lower calcarine --> Upper VF
Upper calcarine --> Lower VF
NOTE: Each visual cortex represents a visual field NOT an eye.

11. Sensitive areas are “magnified”
Field of View
Fovea
Cortical Map of Visual Field