none
Conditions
Interventions
Subjects near infrared visual light perception threshold test group:A total of 8 subjects were exposed to darkness for at least 30 minutes with or without contact lenses
The head is actively fixed in a certain position through the optometric forehead support, and the visible 535nm green light and near-infrared 980 nm light at about 5-10cm in front of the head are reco
b. With eyes closed, the subjects identified the basic flash of 20ms or 50ms with different intensity, and obtained the light sensing threshold parameters in the closed state
c. Test subjects to identify and distinguish flashing lights with different frequencies of 0.4Hz, 2Hz and 2Hz and 10Hz, d. At the same time, the maximum threshold of the subjects' perception of flash
Subjects' near-infrared visual time-frequency resolution test group:A total of 8 subjects were exposed to darkness for at least 30 minutes with or without contact lenses
The head is actively fixed in a certain position through the optometric frontal support, and the information transmitted by the visible 535nm green light and near-infrared 980 nm light at about 5-10cm
Sponsors
Department of Life Sciences and Medicine, University of Science and Technology of China/ the First Affiliated Hospital of University of Science and Technology of China
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Inclusion criteria
Inclusion criteria: 1. Normal or corrected visual acuity in both eyes (up to 1.0 in both eyes); 3. Age range between 18 and 40 years old; 4. Normal color vision; 5. Volunteer to participate in the project
Exclusion criteria
Exclusion criteria: 1. Patients with a history of visual disease; 2. Participants who have participated in other visual tests within three months; 3. Recent overwork fatigue; 4. Pregnant or lactating women; 5. Use electronic products for more than 6 hours a day;6. Take medications that may affect your vision; 7. In the Investigator's opinion, the subject is not suitable to participate in any other circumstances of the trial
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| light sensitivity;contrast sensitivity;vision acuity; | — |
Secondary
| Measure | Time frame |
|---|---|
| Flash-fusion-frequency sensitivity; | — |
Countries
China
Contacts
Public ContactTian Xue
Department of Life Sciences and Medicine, University of Science and Technology of China
Outcome results
None listed