Central Visual Fields
February 15th, 2021
Overview
Includes the inner 30 degrees of vision.
How to Assess
- Ask the patient to cover one eye. Move a red examination pin from lateral to medial, asking the patient when they can see the pin as red. Ask the patient if the pin disappears at any time.
Interpretation
- Physiologic scotoma (blind spot) - at 15 degrees temporally, due to the entry of the optic nerve.
- Ring scotomaRetinal degeneration
- Central scotomaMacular or optic nerve pathology
- Generalised scotomaCorneal, vitreal, retinal, optic nerve or intracranial pathology
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