Evaluate the Safety and Effectiveness of Electronic Vision-aid Device

Clinical Trial of the Safety and Effectiveness of Vision Pro Electronic Blind Aid Device

To evaluate the safety and effectiveness of electronic Vision-aid Device in walking and obstacle recognition for visually blind people

Inclusion Criteria:

1. Age 18-65 (including 18 and 65 years old)；
2. Visually impaired people；
3. Primary blind and visually impaired people
4. visual acuity is no light ~ < 0.02；
5. visual field radius less than 5°);

Exclusion Criteria:

1. . Allergic to nickel or stainless steel;
2. epileptic seizures;
3. pregnant women； 4.、implanted with electronic medical devices ；

5、 intellectual disability ； 6、 mental illness; 7、 Oral diseases； 8、oral ulcers, herpes, herpes simplex, oral thrush and map tongue； 9、 speech dysfunction, 10、limited mobility and hearing impairment;