What is the term for the contour obtained with a single target of a particular size and brightness in kinetic perimetry?

The correct term for the contour obtained with a single target of a particular size and brightness in kinetic perimetry is "isopter." In kinetic perimetry, the isopter represents the boundaries of a defined visual field as the target moves across the visual field. It shows the extent of vision and allows clinicians to map out areas where vision is intact or impaired.

When the target is presented, the point at which the patient first detects the target and subsequently loses sight of it delineates this contour. The isopter helps visualize different levels of sensitivity in different parts of the visual field and is essential for diagnosing and monitoring conditions affecting vision.

A scotoma refers to an area of visual loss or a defect in the visual field that can be caused by various conditions, but it does not represent the same concept as an isopter. A threshold typically relates to the minimum level of stimulus intensity that can be detected, and a fixation point is the point in the visual field where the patient is directed to focus. These terms pertain to different aspects of visual field testing and do not accurately describe the contour outlined by a single target in kinetic perimetry.