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Head and eye echoencephalogram   

Overview | Risks | Results

Alternative names:

Echoencephalogram; Eye and orbit sonogram; Eye and orbit ultrasound

Definition:

In this test, the eye is examined by ultrasound. The ultrasound uses high frequency sound waves that are emitted and received by a transducer (a hand-held instrument), and the sound waves penetrate the body. Based on the waves recorded, it is possible to determine if the structures being examined are functioning properly.

How the Test is Performed

The test is usually done in the ultrasound or radiology department. You will be lying down on the table. For the A-scan, the eye will be numbed with anesthetizing drops. A clear plastic eye cup is then placed over the eyeball. A lubricant is placed on the cup, and the transducer is positioned on the cup.

The B-scan is performed with the eyes closed. The lubricant is placed on the eyelid, and the transducer is positioned on the lubricant.

How to Prepare for the Test

Adults:
No special preparation is necessary for this test.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experiences, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

• Infant test or procedure preparation (birth to 1 year)
• Toddler test or procedure preparation (1 to 3 years)
• Preschooler test or procedure preparation (3 to 6 years)
• Schoolage test or procedure preparation (6 to 12 years)
• Adolescent test or procedure preparation (12 to 18 years)

How the Test will Feel

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

Why the Test is Performed

The ultrasound helps evaluate the farthest part of the eyeball when there are cataracts. The test may help diagnose retinal detachment or other disorders and evaluate orbital lesions and intraocular lesions.

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