A visual field examination is done for many different reasons, but most often it is used to test or watch patients who have glaucoma. So just what is a Visual Field Perimeter test that your Eye Doctor requires you to have? It may be pointed to by distinctive names like automated perimetry, visual field system, visual field test, SITA (slang for Swedish Interactive Thresholding Algorithm) threshold test, or several other terms. The original testing technique was called a tangent screen which is just a black square of an element hanging on the wall. A visual field test has performed, the eye’s sensitivity out into the outer parts of the retina. All the other eye tests only examine the small central or specific part. But the visual field test examines not only the outer retina, but also examines the pathway of the eye nerves through the brain to some degree.
Your specialist will perform a visual field test which is either a screening test or a threshold test. An Optometrist performs a screening test to examine the eye for diseases or any other vision problems. Other than that a threshold visual field test is performed by your eye specialist is the much more detailed eye test. As we know that the hill of vision contracts with age, in a threshold test your results will be compared with someone of your same age but without glaucoma or any other eye diseases. The results of the eye test will generate detailed statistical results. You should consult a reputed Doctor if you are observing any such effects on your eyes.
When Perimeter Visual Field Test is Necessary?
There are not many clinical situations that would demand to test the peripheral field. With Patients who are facing a neurological visual field defect that is not explained clearly with central testing. Other than that the driver's license test also demands evaluating the peripheral field. In Canada to qualify your driver's exam, it is required by the applicant to have a visual field of 120° in the horizontal dimension as well as 15° above and below the point of fixation.
Many individuals worry about the responses they make, if they clicked late, clicked unintentionally, or facing the dimness of some light points just on the edge of visual attention. This should not be something to worry about as Visual field systems are very sophisticated and examine your mistakes, examine them, and gives an index showing us how much difference there was in your eye exam.
There is no such after effect of Perimeter Visual Field Test that patients needed to be concerned about. Other than glaucoma, a visual field test system can also be very helpful to diagnose pituitary tumors, neurological problems, and loss of sight and headaches that are unable to explain by the other tests. If you live in an area where the sun is very bright, it is recommended for you to always go out with a sunshade.
