What is the most widely used method of visual field screening that requires no special equipment?

Confrontation testing is the most widely used method of visual field screening that requires no special equipment. This method involves the examiner sitting or standing in front of the patient while both maintain eye contact, and then the examiner asks the patient to cover one eye. The examiner then wiggles their fingers in the periphery of their own field of vision while the patient reports when they can see the motion. By comparing the patient's responses with their own visual field, the examiner can assess the patient's peripheral vision in a simple and effective way.

This method is advantageous because it can be performed in various settings without the need for specialized technology or tools, making it accessible and practical for quick assessments. The simplicity and ease of execution of confrontation testing are what make it the most widely adopted screening technique for visual fields in practice, especially in clinical settings where quick evaluations are necessary.