Any physician or any person authorized by law to act as an obstetrician shall immediately upon the birth of an infant instill into the eyes of such newly born infant a prophylactic solution approved by the secretary of health and environment: Provided, however, That any person or parent shall not be required to employ such prophylactic if objection is made by written statement to the attending obstetrician within three days from the birth of said child: And provided further, That said written statement shall be attached to the birth certificate.