Final answer:
The cover test is the most recognized test to clinically measure fixation disparity.
Step-by-step explanation:
The cover test is the most widely used tool for measuring fixation disparity clinically. In order to perform this test, the patient must focus on a far-off object while one eye is covered by the examiner. The eye is then swiftly exposed, and the examiner watches for any movement or misalignment of the eyes as they change from being covered to being uncovered. Although they are mentioned, tests like the Snellen chart, peripheral vision tests, and the Ishihara test concentrate on different parts of vision rather than fixation disparity in particular.