Visual field testing checks how well you can see in all areas of your vision, including your side (peripheral) and central vision. It's used to find and monitor vision problems, especially those that might not show up in a regular eye exam.
There are a variety of methods to measure the visual fields. During an eye exam, visual field testing is performed on one eye at a time, with the opposite eye completely covered to avoid errors. In all testing, the patient must look straight ahead at all times to accurately map the perip...
1. Confrontation visual field test An optometrist typically uses confrontation visual field testing to determine if further field testing is required. In confrontation testing, one eye is covered and the other focuses on a target object. The optometrist then asks the patient to describe what is see...
Visual field testing is an important, subjective test of patients' central and peripheral vision sensitivity to light stimuli. It is most commonly applied in glaucoma clinics and neuro-ophthalmic clinics. However, its application can extend to any situation where one wants to create a spatial map ...
Visual Field Testing - Evidence-Based Physical Diagnosis (Second Edition) - CHAPTER 54ELSEVIEREvidence-Based Physical Diagnosis (Second Edition)
A visual field test measures a person’s whole scope of vision. This includes both the central and peripheral, or side, vision. These tests map the individual fields of the eyes. Visual field testing requires the patient’s full cooperation, as he or she must understand the test that is ...
Various ways of testing the visual fields in glaucoma include the automated perimeter, the Goldmann perimeter, the Friedman field analyzer, and the tangent screen. Conventional automated perimetry, most commonly using the Humphrey perimeter, employs a white stimulus on a white background (white-on-...
Patients with central field deficits typically have difficulty focusing vision on a specific spot, a requirement of this technology. Microperimeters Also known as fundus-driven perimetry, microperimetry is the next iteration of visual field testing. These perimeters solve a substantial limitation of ...
The testing itself can be performed using stationary or moving targets (disk mounted on a stick or examiner's fingers). The normal visual field reaches 180º in the horizontal plane (160º for monocular vision) and 135º in the vertical plane. A moving target should start outside the ...
First of all, there are visual field devices used to perform automated static perimetry and those for manual kinetic perimetry. Automatedtests utilize computer programs to vary test speed, target size, and luminance. Automated tests also benefit from standardized testing conditions, which can be ...