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Tests and diagnosis
By Mayo Clinic staff
Diagnostic tests for dry macular degeneration may include:
- Testing for defects in your central vision. During a complete eye exam, your eye doctor may use a test called the Amsler grid to test for defects in the center of your vision. If you have macular degeneration, when you look at the grid some of the straight lines may seem faded, broken or distorted.
- Examining the back of your eye. Your eye doctor will examine the back of your eye to look for a mottled appearance that's caused by drusen — yellow deposits that form in people with macular degeneration. To examine the back of your eye, your eye doctor will dilate your eyes using eye drops and then use a special magnifying lens.
- Creating images of the blood vessels in your eye (angiogram). During an angiogram of your eye, a colored dye is injected into a vein in your arm. The dye travels to the blood vessels in your eye. A special camera is used to take pictures of your eye. The pictures show the dye highlighting the blood vessels in your eye. Your eye doctor uses the information from the angiogram images to determine whether the back of your eye shows blood vessel or retinal abnormalities that might be associated with wet macular degeneration.
- Optical coherence tomography. This noninvasive imaging test helps identify and display areas of retinal thickening or thinning. Such changes are associated with macular degeneration. It's often used to help monitor the response of the retina to macular degeneration treatments.
References
- Age-related macular degeneration. American Academy of Ophthalmology. http://one.aao.org/asset.axd?id=29a3f5f4-afa1-41ea-bbc5-0bb01ff1fc9c. Accessed July 27, 2010.
- Rosenfeld PJ, et al. Age-related macular degeneration. In: Yanoff M, et al. Ophthalmology. 3rd ed. Philadelphia, Pa.: Mosby; 2008. http://www.mdconsult.com/das/book/body/199400089-5/0/1869/0.html. Accessed July 27, 2010.
- Facts about age-related macular degeneration. National Eye Institute. http://www.nei.nih.gov/health/maculardegen/armd_facts.asp. Accessed July 27, 2010.
- Arroyo JG. Age-related macular degeneration: Treatment and prevention. http://www.uptodate.com/home/index.html. Accessed July 27, 2010.
- Making the most of low vision. EyeSmart. http://www.geteyesmart.org/eyesmart/diseases/amd-low-vision.cfm. Accessed July 27, 2010.
- Schadlu AP, et al. Charles Bonnet syndrome: A review. Current Opinion in Ophthalmology. 2009;20:219.
- Devices to help with low vision. Macular Degeneration Partnership. http://www.amd.org/living-with-amd/low-vision/80-devices-to-help-low-vision.html. Accessed Aug. 10, 2010.
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