A Fill In Optometrist is a licensed eye care professional who temporarily covers shifts at optometry practices, clinics, or retail optical centers. They perform eye exams, diagnose vision conditions, and prescribe corrective lenses or treatments as needed. These positions are typically short-term, helping practices maintain patient care during staff absences, vacations, or busy periods. Fill In Optometrists may work on a per diem, part-time, or contract basis, providing flexibility in their schedules.