Which of the following methods can be used to measure visual acuity potential?

The potential acuity meter is specifically designed to measure visual acuity potential, particularly in patients who may have cataracts or other conditions that obscure their visual acuity. This device allows for the assessment of how well a patient can see through the optical media by projecting a vision chart onto the retina, effectively circumventing any opacities. It helps determine the patient's highest level of vision that could be achieved if the opacities were removed or resolved.

Other methods listed, such as visual field tests and confrontation tests, assess different aspects of vision, like peripheral vision and gross visual field, rather than the potential visual acuity directly. Fundus examination primarily allows an ophthalmologist to view the interior surface of the eye and diagnose conditions, but it does not measure visual acuity. Thus, the potential acuity meter is the instrument that directly evaluates visual acuity potential, making it the correct choice.