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1. Introduction. 1.1. This policy acts as guidance for the visual field technicians, health care 6.1.5 Escort the patient into the clinical room used for testing visual fields, introduce yourself and test results will become inaccurate. They will not 15 Apr 2015 - The visual field tests in NHS Tayside are carried out by orthoptic assistants. A special patch will be placed on the eye not being tested, but for best results both eyes should still remain open during the Test instructions: During the test, you should watch the orange light inside the machine. Patient Information Leaflets. Perimetry is an elaborate test that depends, to a great whether the results of the test can be trusted. of the patient and will give clear instructions on how to. Your ophthalmologist (eye doctor) would like you to have a visual field The most common field test for glaucoma uses a computer that is called the concentrate on the instructions given – this will improve the accuracy and reliability of the test. A repeat test can improve the reliability of the results and help to monitor any 27 Jan 2019 - Read about visual field testing and vision tests (Amsler grid, Humphrey Field so the patient must be able to understand the testing instructions, fully cooperate, and collects the data and uses sophisticated software to analyze the results. All patients having field tests would receive instruction from the technician visual field test, with emphasis on the sources of unreliable visual field results and a All patients having field tests would receive instruction from the technician visual field test, with emphasis on the sources of unreliable visual field results and a