After approval of Beijing municipal commission of health and family planning, ophthalmology of Peking University Third Hospital (PUTH) obtained clinical virus gene amplification identification, and ophthalmology will soon launch virus gene detection. In terms of ambitious goal called “precise medical”, clinical diagnosis requires increasingly high qualified etiological examination. Identifying etiology and source of infection, ensuring types of medicine and effective concentration means a lot to clinical treatment. Meanwhile, to a large extent, it helps increase efficiency, save cost and release financial burden of both patients and the country.