You mean physician. An optometrist typically has a Doctor of Optometry degree. One can argue if that's really a Dr. (I'd say it more like an MS), but nonetheless they could be called Dr. They also write prescriptions for lenses.
An optician fits the glasses, which is more like the technician.
An optometry program lasts four years, so that is equivalent to the schooling needed for an MD. (After schooling there is a state and national examination in order to get the license.)
An optician fits the glasses, which is more like the technician.