The provisions of this chapter do not apply to the following persons:
1. Persons who sell spectacles, eyeglasses, or other articles of merchandise without attempting to practice optometry.
2. Student interns who are currently enrolled in an optometry school or college accredited by the accreditation council on optometric education of the American optometric association, or its successor agency, or who have graduated no more than six months prior, and are under the immediate and direct supervision of a licensed optometrist.
3. Physicians and surgeons licensed under chapter 43-17.