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Oct 31, 2023 · A visual field test measures how well you can see above, below, and on either side of you. It can help diagnose diseases of the eye, optic nerve, and central nervous system that affect your vision.
Jan 20, 2024 · Learn what visual field means, how it is measured and what is a normal visual field range. Find out how to protect your visual field and what are the common causes of visual field loss.
The visual field is "that portion of space in which objects are visible at the same moment during steady fixation of the gaze in one direction"; in ophthalmology and neurology the emphasis is mostly on the structure inside the visual field and it is then considered “the field of functional capacity obtained and recorded by means of perimetry”.
Mar 10, 2022 · Learn what visual field testing is and why it is important for eye health. Find out the types, purposes and results of different visual field tests for various eye conditions and diseases.
A normal visual field is an island of vision measuring 90 degrees temporally to central Fixation, 50 degrees superiorly and nasally, and 60 degrees inferiorly. Visual acuity increases from movement discrimination in the extreme peripheral vision to better than 20/20 in the center of vision.
Dec 12, 2015 · Learn the basic terms and principles of visual fields, the "island of vision" in a sea of darkness. Understand the concepts of visual sensitivity, extent, threshold, and isopter, and how they are measured and mapped.
Jul 9, 2017 · Learn what a visual field test is and how it can help your doctor diagnose problems with your side vision. Find out the different ways to test your visual field, such as confrontational, tangent screen, and automated perimetry exams.
