NIOEYES.COM The Definitive
Ophthalmic Server
|
|
NIOEYES.COM The Definitive
Ophthalmic Server
|
|
Eye
Problems,Causes, Prevention, Tests, Treatments, Consulting your Doctor
|
| Eye Echoencephalogram | ||
| Table of Contents | ||
| Alternative Names echoencephalogram; eye and orbit sonogram |
||
| Defination 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. By electronic conversion the sound waves are arranged into the picture image seen on a screen. In this test, two types of scans are used. The A-scan takes the echoes and converts them into the positions of different structures. The B-scan takes the echoes and converts them into a two - dimensional cross section image of the structures. |
||
| 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. |
||
| Prepration 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 experience, 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:
|
||
| How the test will feel Your eye is numbed so no discomfort is involved. You may be asked to look in different direction to improve ultrasound image or to view different areas of the eye. |
||
| Risks Do not rub your anesthetized eye until the anesthetic wears off or you may scratch the cornea. |
||
| How 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. |
||
| Normal Values The structures of the eyeball appear normal. |
||
| What abnormal Values mean The test may reveal vitreous hemorrhage (bleeding into the transparent gel that fills the eyeball between the retina and the lens) and abnormalities, retinal detachment (a separation of the retina from the middle coat of the eyeball), tumors, retinoblastomas (a malignant growth of retinal cells), orbital lesions, foreign bodies, and inflammation. Additional conditions under which the test may be performed:
|
||
| Special Considerations An echoencephalogram can also be used to examine the cerebral structures (for example, in checking for hydrocephalus), although it is more commonly used for eye disorders. |
||
|
Disclaimer |
| The information contained above is intended for general reference purposes only. It is not a substitute for professional medical advice or a medical exam. Always seek the advice of your physician or other qualified health professional before starting any new treatment. Medical information changes rapidly and while NIO and its content providers make efforts to update the content on the site, some information may be out of date. No health information on NIO, including information about herbal therapies and other dietary supplements, is regulated or evaluated by the Health Ministry of the Government of India and therefore the information should not be used to diagnose, treat, cure or prevent any disease without the supervision of a medical doctor. |