1. educational background: applicants usually need to have a bachelor's degree or equivalent in related majors, and bachelor's degrees in medicine, ophthalmology, biomedical engineering and other related majors are preferred.

2. Achievement requirements: Applicants should achieve certain achievements at the undergraduate level. The specific requirements will vary according to the school and year. Generally, GPA (average grade point average) is required to be within a certain range.

3. Relevant scientific research experience: having certain scientific research experience, having conducted scientific research projects or published relevant papers in ophthalmology, medicine or related fields will add points to the application.

4. Letter of recommendation: Usually two or three letters of recommendation are needed. The referees can be undergraduate tutors, researchers or other professionals who have close cooperation with the applicants.