Optometrists, or Doctors of optometry, examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. Optometrists prescribe medications, low vision rehabilitation, vision therapy, spectacle lenses, and contact lenses and perform certain surgical procedures. Optometrists counsel their patients regarding surgical and nonsurgical options that meet their visual needs related to their occupations, avocations, and lifestyles.