Nothing in this subchapter shall be construed as conferring, on the holder of any license hereunder for the practice of optometry, the title of doctor, oculist, ophthalmologist, or any word or abbreviation indicating that he is engaged in the practice of medicine or surgery, or the treatment or diagnosis of diseases of or injuries to the human eye, or the right to use drugs or medicines in any form for the treatment or examination of the human eye. The title “Doctor” or the abbreviation “Dr.” shall not be used before the name of any registered optometrist without the word “optometrist” following the name.