Information on the application of the dark adaptation instrument

Dark Adaptation Model: HAD-BD-II-120

Adaptation is an important adaptive function of visual changes in the environment. It shows that the human eye turns from the bright place to the dark place and the vision has a process of gradual recovery and adaptation. As the size of the pupil from the light to the dark changes, the optic nerve and the retina also produce biochemical changes, which requires a time process to gradually adapt the vision to the dark environment, a process called dark adaptation.
This instrument is mainly used in psychology teaching experiments, and can also be used in test applications in the field of driver suitability testing. The instrument was designed to fix the strong light source as a bright environment. The subjects suddenly extinguished after 30 seconds of adaptation in a strong light environment, showing digital indications in low light conditions, and the dark sensitivity of the subjects was tested by the visual sensitivity of the test subjects.
Main Specifications:
1. The glare setting time is 30 seconds;
2. Test time under low light: 5, 10, 15, 20, 25, 30 seconds, 6 steps, the window bezel is controlled by the motor;
3. Visual acuity test table: digital card on transparent film, 4 pieces;
4. Visual acuity test table: 10 lines, corresponding visual acuity 0.1, 0.15, 0.2, 0.25, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0;
5. Apparently adapt to the application field of view brightness: 2000 Lux;
6. Suggested standard brightness: 0~1.5 Lux, linearly divided into 8 files;
7. Dimensions: 750 × 370 × 465mm;

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