What is the primary purpose of the visual fields by confrontation test?

The primary purpose of the visual fields by confrontation test is to evaluate peripheral vision. This examination helps to detect any defects in the visual field that could indicate underlying conditions like glaucoma, retinal issues, or neurological disorders. During the test, the clinician compares the patient's ability to see objects in the periphery of their vision to their own, ensuring a comprehensive assessment of how well the patient can detect stimuli outside of their direct line of sight.

While evaluating central distance vision is important, it is distinct from what the confrontation test specifically measures. Similarly, the assessment for narrow-angle glaucoma and checking for accommodation involve different techniques and focus on other aspects of eye health. Thus, the correct answer highlights the specific role of the confrontation test in assessing peripheral vision.