As an optometrist, your mission will be simple: To help people see more clearly. Optometrists are healthcare professionals who work in doctors' offices or eyewear stores (like Pearle Vision) and typically perform eye exams, prescribe and fit contact lenses and glasses, and treat common eye diseases like glaucoma or diabetes complications. Unlike ophthalmologists, who are physicians that are also trained in eye surgery, optometrists don't need to attend medical school and a residency program to work in this field. Instead, an aspiring optometrist goes to a four-year optometry program after college and graduates with a Doctor of Optometry (DO) degree. The hours are regular—after all, you almost never hear about crazy contact-lens emergencies. A good salary, the chance to help others, and a job that's in high demand are just a few other things that make for a lot of very happy optometrists.