Is a opticians a medical doctor?

No.

Opticians are technicians trained to design, verify and fit eyeglass lenses and frames, contact lenses, and other devices to correct eyesight.

Optometrist are healthcare professionals who are qualified to provide primary vision care ranging from sight testing and correction to the diagnosis, treatment, and management of vision changes. An optometrist is not a medical doctor

Ophthalmologists are medically qualified doctors who specializes in eye and vision care. Ophthalmologists differ from optometrists and opticians in their levels of training and in what they can diagnose and treat. As a medical Doctor Who has completed college and at least eight years of additional medical training, an ophthalmologist is licensed to practice medicine and surgery.