Loss of use or blindness of one eye, having only light perception, will be held to exist when there is inability to recognize test letters at 1 foot (.30m.) and when further examination of the eyes reveals that perception of objects, hand movements or counting fingers cannot be accomplished at 3 feet (.91m.), lesser extents of visions, particularly perception of objects, hand movements, or counting fingers at distances less than 3 feet (.91 m.), being considered of negligible utility. With visual acuity 5/200 (1.5/60) or less or the visual field reduced to 5° concentric contraction, in either event in both eyes, the question of entitlement on account of regular aid and attendance will be determined on the facts in the individual case.