Section 333.17411 - Practice of optometry; authorization required; use of words, titles, or letters(1) A person shall not engage in the practice of optometry except as authorized by this article.(2) The following words, titles, or letters or a combination thereof, with or without qualifying words or phrases, are restricted in use only to those persons authorized under this part to use the terms and in a way prescribed by this part: "doctor of optometry", "optometrist", and "o.d.".Amended by 2006, Act 410, s 1, eff. 9/29/2006.1978, Act 368, Eff. 9/30/1978.