Unit 6: Differential Diagnosis of Blurred Vision

Investigations

Intraocular pressure (IOP) measurement

Non contact tonometry
Goldman tonometry

Visual field testing

Confrontation testing not sensitive enough
Humphrey visual field test [see image]
Classic field defect is the arcuate scotoma

Glaucoma Arcuate defect

The dark black areas indicate parts of the visual field not seen during testing, and the gray areas indicate areas of reduced sensitivity. The arcuate defect shown is typical, extending from the optic disc (arrow), around the macula, with preserved central vision.

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Humphrey visual field test

Humphrey visual field test

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