perimetric threshold

Perimetric threshold refers to the faintest level of visual stimulus—such as a light or shape—that a person can detect at the edge of their visual field. It’s used in eye tests to determine the minimum visibility necessary for detection at different points around a person’s peripheral vision. By measuring these thresholds, eye care professionals can assess the functionality of the visual field, identify areas of vision loss or weakness, and monitor conditions like glaucoma or optic nerve damage. Essentially, it helps quantify how sensitive your peripheral vision is around the edges of what you can see.