What is the primary function of an optician?

The primary function of an optician is to fit patients with glasses and contact lenses. This role involves interpreting prescriptions written by optometrists or ophthalmologists and providing the appropriate eyewear solutions based on the individual patient's needs. Opticians possess the skills to help patients select frames, take precise measurements of their facial dimensions, and ensure that optical products fit comfortably and correctly. They also educate patients on the care and maintenance of their eyewear.

While conducting eye examinations is crucial for eye care, this responsibility typically falls within the realm of optometrists. Eye surgeries are performed by ophthalmologists, who are medical doctors specializing in eye care. Prescribing medications for eye conditions is likewise the role of licensed eye care professionals like optometrists and ophthalmologists, not opticians. Thus, fitting patients with glasses and contact lenses is distinctly aligned with the responsibilities of an optician, making it the correct answer.