[ARTICLE] A computerized perimeter for assessing modality-specific visual field loss – Full Text PDF

Abstract

The characterization of visual field loss provides a
valuable diagnostic metric for studying the effects of damage to
the retina, optic nerve or visual cortex. We describe a tool, the
Quadrant Vision Perimeter (QVp), to rapidly and accurately
measure visual fields. In addition to measuring the location of
visual deficits, the tool can assess modality-specific field loss
(e.g., impaired detection of luminance, motion, depth and color)
and severity of the deficit. We present validation and
normalization for parameters of visual attributes, as well as
exemplar comparisons of visual fields obtained automatically
using QVp to standardized perimeters for three stroke patients.
Patient visual fields are compared among visual features to
assess modality-specific deficits, and over time, to measure fine
changes in visual fields, due either to spontaneous recovery or
visual degradation.

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