Educational Requirements. If you're interested in becoming an optometrist, you'll first need to complete a 4-year bachelor's program, preferably in a relevant or related field like biology, chemistry, or physiology. You'll need a bachelor's degree to apply for optometry programs, which are rather competitive. Optometry programs typically take an additional four years to complete; upon completion you must meet national and your state's licensing requirements in order to become a practicing optometrist.