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Visual fields are frequently evaluated by simply covering one eye and asking the patient to look straight ahead while using peripheral vision to identify an object, or the number of fingers shown by the examiner.
The size of the field in degrees is equal to the size of the area seen, measured in centimetres. Some patients experience changes in the size of the visual field at different luminance levels.
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.
3 mar 2020 · It is easy to get into the habit of using one type of visual field test, but each type of programme is designed for a different purpose. The optometrist will consider the pros and cons of each test when deciding on the most suitable one to use for a particular patient.
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"; [1] 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...
The visual field is that area in space perceived when the eyes are in a fixed, static position looking straight ahead. The monocular visual field (Figure 14.1) is that area of space visible to one eye. can be mapped parametrically. Perimetry testing provides a detailed map of the visual field.
Definition. The field of vision is that portion of space in which objects are visible at the same moment during steady fixation of gaze in one direction. The monocular visual field consists of central vision, which includes the inner 30 degrees of vision and central fixation, and the peripheral visual field, which extends 100 degrees laterally ...
