An Optometrist is the medical professional concerned with the eyes and their physical structure, as well as overall vision, visual systems, and visual information processing. While the certification process varies internationally, Optometrists are generally qualified to diagnose and treat diseases and disorders of the entire visual system, as well as to prescribe medications that will help a patient meet their treatment goals. They carry the title of Oculus Doctor (OD), and are afforded many of the same rights and privileges as other types of doctors.