Study the visual field below and answer the questions (click on the picture to enlarge).

a. What is the visual field criteria for driving in the UK?

b. What visual field defect is shown in the picture?

c. Does the patient meet the criteria for driving?

 

Answer to a
The minimum visual field for safe driving is at least 120 degrees 
on the horizontal meridian. In addition there should be no
significant field defect in the binocular field which encroaches
within 20 degrees of fixation either above or below the horizontal meridian

 

Answer to b
Left inferior homonymous quadrinopia.
This patient suffered from cerebrovascular accident a few years ago.

 

Answer to c
No.
The Esterman field test show that the patient does not 
meet the criteria for driving as the quadrinopia comes too close to the fixation.

 

Go to station 8

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