Which procedure is an optometrist NOT permitted to perform?

Optometrists are trained to diagnose and manage a wide range of eye conditions and are typically permitted to perform a variety of functions related to eye care. However, the procedure that an optometrist is generally not permitted to perform is surgery, which includes operating on patients. This limitation is due to the scope of practice defined for optometrists, which primarily focuses on vision care, including the examination, diagnosis, and treatment of visual system disorders.

In contrast, prescribing glasses, conducting eye exams, and fitting contact lenses are well within the practice scope of optometrists. They are fully qualified to perform these tasks, as their training includes extensive education in vision testing and the correction of refractive errors through lenses. Thus, the correct answer identifies the procedure that falls outside their permitted range of responsibilities, highlighting the distinct roles within eye care professions.