(1) Except as otherwise provided in subsection (2), spectacles and contact lenses are medical devices and are subject to the requirements of this part for the protection of consumers.

  (2) This part does not apply to any of the following:

  (a) A diagnostic contact lens that is used by a licensee during an examination and evaluation.

  (b) An optical instrument or device that is not intended to correct or enhance vision.

  (c) An optical instrument or device that is not made, designed, or sold specifically for a particular individual.