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3 days ago · A visual field test can help diagnose scotomas, or blind spots. It can also help identify loss of peripheral or side vision. Loss of side vision is an indicator of glaucoma, a disease that can lead to blindness. This article describes what to expect during a visual field test, why it's done, and what the results mean.
Apr 4, 2023 · A visual field test measures your peripheral vision, or how well you can see above, below and to the sides of something you’re looking at. It’s also called a perimetry test. Visual field testing is important for many conditions, including glaucoma.
The visual field index is a staging index designed to correspond to ganglion cell loss, that is, 100% represents normal fields and 0% represents blind fields. The mean deviation represents the degree of departure of the whole field's average values, from age-adjusted normal values.
- Sui H Wong, Gordon T Plant
- 2015
- Nonspecific / low Reliability / inattention / patient hungry. For every interpretable, reliable visual field you get, you will also get another in which the patient thinks he should be scanning the dome for lights the whole time, is poorly positioned, is exhausted from waiting in your clinic for hours, or is too elderly and arthritic to push the button in time.
- Superior / inferior arcuate defect. The most common early to mid stage glaucomatous field. The reason these look like arcs and come off the blind spot is that they represent the loss of bundles of nerves as they come out of the optic nerve head.
- Blind spot enlargement. This can be seen in glaucoma, but also can occur with papilledema and optic nerve head swelling. This would likely be seen in patients with idiopathic intracranial hypertension (aka pseudotumor cerebri).
- Severe constriction with a central island. Unfortunately, this is end stage glaucoma. At this point, many patients still have great central vision of 20/20 to 20/50, but peripheral vision is nearly gone.
Apr 19, 2024 · Learn about the dos and don'ts of preparing for a visual field test. Find out what you should do before the test to ensure accurate results and what you should avoid to prevent any interference. This article provides valuable tips and guidelines to help you get ready for your visual field test.
Oct 31, 2023 · Why does it matter? Field loss means that there are areas of your peripheral vision where you do not see as well as you should. The reason we test this is because in certain conditions, especially glaucoma, if left untreated the disease can severely restrict your vision. How long will it take?
Feb 10, 2024 · Here, glaucoma experts review the strengths and weaknesses of visual field testing, as well as provide their tips on interpreting patients’ fields. Visual Fields: An Overview. “When patients are diagnosed with glaucoma, they either have no functional deficits and a normal visual field, or they have some deficits.
