After graduating from high school in only two years, Bath headed to Hunter College, where she earned a bachelor's degree in 1964. She then attended Howard University to pursue a medical degree. Bath graduated with honors from Howard in 1968, and accepted an internship at Harlem Hospital shortly afterward. The following year, she also began pursuing a fellowship in ophthalmology at Columbia University. Through her studies there, she discovered that African Americans were twice as likely to suffer from blindness than other patients to which she attended, and eight times more likely to develop glaucoma. Her research led to her development of a community ophthalmology system, which increased the amount of eye care given to those who were unable to afford treatment.