Average annual earnings: $115,750
Job description: They diagnose, manage, and treat conditions and diseases of the human eye and visual system, but make just a fraction as much as some other medical professionals. For comparison, the average pediatrician earns $183,180 a year, and dentists, who undergo a similar amount of training, earn $177,130.
Educational requirements: A bachelor's degree is required, followed by a four-year stint in optometry school to earn an OD. A residency sometimes follows that for those who want to pursue a particular specialty.