Certified Ophthalmic Technician (COT) Practice Test 2026 - Free COT Practice Questions and Study Guide

Brightness Acuity Testing (BAT) is designed specifically to assess how an individual's visual acuity is affected by varying lighting conditions. This test is particularly relevant for patients with certain visual impairments, such as cataracts or other conditions affecting clarity and contrast sensitivity. By altering the brightness of the light during the test, practitioners can evaluate whether changes in illumination impact the patient's ability to see the optotype clearly.

The correct answer highlights the focus on the influence of light intensity on visual performance. In clinical practice, understanding how different lighting environments affect a patient's vision is crucial for developing effective treatment plans and improving their quality of life.