What type of glare does the Brightness Acuity Test primarily assess?

The Brightness Acuity Test primarily assesses disability glare, which is the type of glare that interferes with a person's ability to see due to bright light sources, typically causing a reduction in visual acuity. This test is designed to simulate conditions where bright light from various sources can affect vision, often experienced by individuals with cataracts or other ocular conditions. During the assessment, patients are exposed to a bright light while performing visual tasks, thereby evaluating how well they can see when confronted with strong illumination.

Disability glare can be particularly problematic because it can diminish contrast sensitivity and overall visual performance, despite the presence of not necessarily having a complete loss of vision. The Brightness Acuity Test helps in determining how much this type of glare impacts a patient's everyday functioning, especially in bright environments, thus guiding further clinical management or intervention.