This chapter shall not affect any person licensed as an optometrist under Chapter 7 of Division II of this code, or any physician and surgeon licensed under Chapter 5 of Division II of this code. Such exemption shall not apply to any optometrist or physician and surgeon exclusively engaged in the business of filling prescriptions for physicians and surgeons. This chapter does not prohibit the sale of goggles, sun glasses, colored glasses, or occupational protective eye devices if they do not have refractive values nor do the provisions of this chapter prohibit the sale of complete ready-to-wear eyeglasses as merchandise.