All applicants for offices, places or employments in the civil service of such city, except those mentioned in s. 63.27, shall be residents of this state before their application for examination, and shall be subject to examination under and in accordance with the rules so made by said commissioners; except that for technical and professional services the commission may open the examination to residents of other states who are citizens of the United States. Such examinations, including minimum training and experience requirements, shall be job-related in compliance with appropriate validation standards and may include tests of physical qualifications, and, when appropriate, of manual skill. All relevant experience, whether paid or unpaid, shall satisfy experience requirements. No otherwise qualified blind persons shall be discriminated against in examination, reexamination, appointment, reappointment, promotion or demotion unless eyesight is absolutely indispensable for the performance of the duties and responsibilities of the position. No question in any examination shall relate to political or religious opinions or affiliations, and no appointment or selection to an office or for employment within the scope of the rules established as aforesaid shall be in any manner affected or influenced by such opinions or affiliations. All such applicants may be examined by a competent physician as to the soundness of their health for the work to be performed. Upon the request of an applicant or an eligible for a civil service position who is blind, the department of health services, shall obtain from the city civil service commission a detailed description of all duties entailed by such position and shall investigate the necessity for eyesight in the fulfillment of the duties of any position, and shall determine and report its findings to the civil service commission, as to the physical ability of the applicant, or eligible, to perform the duties of such position. Such findings shall be conclusive as to the physical qualifications of any applicant or eligible so examined.