General

Synonym/Acronym:
NFA.

Rationale
To assist in measuring the thickness of the retinal nerve fiber layer, to assist in diagnosing diseases of the eye such as glaucoma.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction. Ensure that the patient who will have a dilated test understands that they must refrain from driving until the pupils return to normal (about 4 hr) after the test and has made arrangements to have someone else be responsible for transportation after the test.

Normal Findings

• Normal nerve fiber layer thickness.

Critical Findings and Potential Interventions
N/A