(a) An unlimited operator's license shall be issued or retained if the applicant or license holder meets the following visual standards: (1) A minimum visual acuity of 20/40 (Snellen) or equivalent in both eyes or the better eye with or without corrective lenses; (2) An uninterrupted binocular visual field of at least 140 in the horizontal meridian, or a monocular field of at least 100 in the horizontal meridian; and (3) No evidence of any other visual condition(s) which either alone or in combination will significantly impair driving ability.