Eye and orbit ultrasound

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Head and eye Echoencephalogram

An eye and orbit ultrasound is a test to look at the eye area. The ultrasound uses high-frequency sound waves that travel through the eye. Reflections (echoes) of the sound waves form a picture of the structure of the eye. The precise size of the eye and any structures in the eye can be measured.

Echography - eye; Ultrasound - eye

The test is usually done in the ophthalmologist’s office or the ophthalmology department. You usually sit in a chair. The eye will be numbed with anesthetizing drops. The ultrasound wand (transducer) is placed against the front surface of the eye.

There are two types of scans:

For the A-scan, you will be asked to look straight ahead.

If a B-scan is performed, you will be asked to look in multiple directions.

No special preparation is necessary for this test.

Your eye is numbed, so no discomfort is involved. You may be asked to look in a different directions to improve the ultrasound image or to view different areas of the eye.

A lubricant placed on the transducer may run on your cheek, but there will be no discomfort or pain. The test takes about 15 minutes.

The ultrasound helps evaluate the farthest part of the eyeball when you have cataracts or other reasons that make it hard to look into your eye. The test may help diagnose retinal detachment or other disorders when the eye is not clear and the ophthalmologist can not use routine examining equipment. An A-scan ultrasound measures the eye for the proper power of a lens implant before cataract surgery.

Review Date: 05/16/2006
Reviewed By: Daniel Kantor, M.D., Director of the Comprehensive MS Center, Neuroscience Institute, University of Florida Health Science Center, Jacksonville, FL. Review provided by VeriMed Healthcare Network.