FDT Visual Field

The normal field of vision encompasses approximately 50 degrees nasal and superior, 70 degrees inferior, and 90 degrees temporal. Sensitivity is greatest in the middle and declines toward the periphery, commonly referred to as the “hill of vision”. Visual field defects are considered to be any significant change in sensitivity from this normal hill of vision. It allows the patients to be tested using their own glasses having no requirement for trial lenses or eye patches and provides simplified interpretation of results