An ophthalmologist uses ultrasonic imaging to help diagnose the underlying cause(s) of a patient's symptoms, to assess the general condition of an injured eye, and to measure the eye prior to corrective surgery. Situations.
An eye and orbit ultrasound is a test to look at the eye area, and to measure the size and structures of the eye.
Alternative NamesEchography - eye; Ultrasound - eye
How the test is performedThe test is usually done in the ophthalmologist's office or the ophthalmology department.
You usually sit in a chair. Your eye is numbed with medicine (anesthetic drops). The ultrasound wand (transducer) is placed against the front surface of the eye.
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 test takes about 15 minutes.
There are two types of scans:
No special preparation is needed for this test.
How the test will feelYour eye is numbed, so you shouldn't have any discomfort. You may be asked to look in different directions to improve the ultrasound image or so it can view different areas of your eye.
A lubricant placed on the ultrasound wand may run on your cheek, but you won't feel any discomfort or pain.
Why the test is performedThe ultrasound can examine the farthest part of the eyeball when you have cataractsor other conditions that make it hard for the doctor to look into your eye. The test may help diagnose retinal detachment or other disorders when the eye is not clear and the ophthalmologist cannot use routine examining equipment.
An A-scan ultrasound measures the eye to determine the proper power of a lens implant before cataract surgery.
Normal ValuesThe structures of the eyeball appear normal.
What abnormal results meanThe test may show:
To avoid scratching the cornea, do not rub the numbed eye until the anesthetic wears off (about 15 minutes). There are no other risks.
An eye and orbit ultrasound is a test to look at the eye area, and to measure the size and structures of the eye.
Alternative NamesEchography - eye orbit; Ultrasound - eye orbit; Ocular ultrasonography; Orbital ultrasonography
How the test is performedThe test is usually done in the ophthalmologist's office or the ophthalmology department of a hospital or clinic.
Your eye is numbed with medicine (anesthetic drops). The ultrasound wand (transducer) is placed against the front surface of the eye.
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 test takes about 15 minutes.
There are two types of scans -- A-scan and B-scan.
For the A-scan:
For the B-scan:
No special preparation is needed for this test.
How the test will feelYour eye is numbed, so you shouldn't have any discomfort. You may be asked to look in different directions to improve the ultrasound image or so it can view different areas of your eye.
A lubricant placed on the ultrasound wand may run on your cheek, but you won't feel any discomfort or pain.
Why the test is performedYour doctor may order this test if you have cataracts or other eye problems.
An A-scan ultrasound measures the eye to determine the right power of a lens implant before cataract surgery.
A B-scan is done to look at the inside part of the eye or the space behind the eye that can't be seen directly. This may occur when you have cataracts or other conditions that make it hard for the doctor to see into the back of your eye. The test may help diagnose retinal detachment, tumors, or other disorders.
Normal ValuesFor an A-scan, measurements of the eye are in the normal range.
For a B-scan, the structures of the eye and orbit appear normal.
What abnormal results meanA B-scan may show:
To avoid scratching the cornea, do not rub the numbed eye until the anesthetic wears off (about 15 minutes). There are no other risks.
ReferencesFisher YL, Nogueira F, Salles D. Diagnostic ophthalmic ultrasonography. In: Tasman W, Jaeger EA, eds. Duane's Foundations of Clinical Ophthalmology. 15th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2009:chap 108.
Coleman DJ, Silverman RH, Rondeau MJ, Daly SW, Lloyd HO. Evaluation of the posterior chamber, vitreous and retina with ultrasound. In: Tasman W, Jaeger EA, eds. Duane's al Ophthalmology. 15th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2009:chap 3.
Massoud TF, Cross JJ. The orbit. In: Adam A, Dixon AK, Grainger RG, Allison DJ, eds. Grainger & Allison's Diagnostic Radiology. 5th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 61.
Fisher YL, Klancnik Jr JM, Rodriguez-Coleman H, et al. Contact B-scan ultrasonography. In: Yanoff M, Duker JS, eds. Yanoff & Duker: Ophthalmology. 3rd ed. Philadelphia, Pa: Mosby Elsevier; 2008:chap 6.7.
Reviewed ByReview Date: 03/30/2011
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine; and Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
A normal ultrasound scan would indicate a fully healthy eye. For therapeutic ultrasound, a normal result would be an improvement in the targeted condition, such as shrinking of a tumor or lessening of pressure inside the eye of a.
Ultrasound imaging equipment allows eye specialists (ophthalmologists) to "see" the eye in great detail without the pain and risk of exploratory surgery, or the limitations and uncertainty inherent to traditional visual examination.
Improperly focused, high-intensity ultrasound could burn and physically disrupt delicate eye tissue and cause injury. This risk is, however, slight and would arise only from improper use, or as a potential side effect of tumor or.
Ultrasound of the eye, properly performed by qualified personnel using appropriate equipment, has no risks. There is no evidence to suggest that the procedure itself poses any threat to a healthy eye, or worsens the condition.
the function of the eye is the ultrasound
Abnormal results fall into the following categories: benign fibrous nodule, complex cyst, suspicious lesion, and lesion highly suggestive of cancer. In cases where ultrasound shows the presence of a complex cyst or.
Preparation by the patient is generally unnecessary, although under special circumstances an ophthalmologist may perform pretest procedures. The ophthalmologist and/or ultrasound technician will conduct all preparations.
Anatomically, the word 'orbit' means the space within the skull within which the eye sits and moves about.
Another name for the eye is oculus, which is Latin.
Patients may experience partial and temporary blurred vision, as well as "eye strain" headaches. These symptoms usually fade within an hour of the procedure, during which time patients should rest their eyes and avoid all activities.
It is the very thin medial wall of the orbit
The orbital is in the eye socket.