3.—(1) Subject to the exceptions specified in paragraph (2), when a doctor or optician tests the sight of another person, it shall be his duty–
(a)to perform, for the purpose of detecting signs of injury, disease or abnormality in the eye or elsewhere–
(i)an examination of the external surface of the eye and its immediate vicinity,
(ii)an intra-ocular examination, either by means of an ophthalmoscope or by such other means as the doctor or optician considers appropriate,
(iii)such additional examinations as appear to the doctor or optician to be clinically necessary; and
(b)immediately following the test to give to the patient a written statement–
(i)that he has carried out the examinations required by sub-paragraph (a) of this paragraph, and
(ii)that he is or (as the case may be) is not referring the patient to a doctor.
(2) The provisions of paragraph (1) do not apply where the testing of sight is carried out by a doctor at a hospital or clinic in the course of diagnosing or treating injury or disease of the eye.