What is a common characteristic of glare testing devices?

Glare testing devices are specifically designed to evaluate how visual performance is impacted by bright light conditions. This is particularly important for individuals who may experience issues with brightness or glare due to various conditions, such as cataracts or certain retinal disorders. The testing process typically simulates bright light exposure and assesses factors such as visual acuity and contrast sensitivity under these conditions.

By focusing on the challenges posed by bright lights, these devices help identify how well patients can see and function in environments with significant glare. This is essential for determining the functional impact of glare on daily activities, particularly for tasks like driving or working in bright environments.