First of all, it can be judged according to the surrounding environment. If there are quiet or rhythmic sounds around, such as insects chirping in the morning, you can know that you woke up in the morning. If someone knocks at the door or someone talks, it means it's noon. When I came up that night, it became very quiet around, and I could know that it was night.
Secondly, you can judge according to your physical condition. The feeling of getting up in the morning is very different, full of energy, and there is a feeling of shining at the moment, so you can know that it is morning. At noon, you will feel heavy and sleepy, and you will know that it is noon. In the afternoon, the eyelids will be like being heavily pressed, and the body will be easily tired. Then you can know it's afternoon.
Third, blind people can also judge time by memory. Because we have to do some repetitive things every day, such as fitness, eating, reading and so on. As long as we can remember what we do every day, we can judge the time.
Finally, the blind can also judge that they are awake through the help of others. Family members or friends will provide them with time-related information, such as what time to get up, what time to eat, and what time to finish class. Let them judge that they are awake according to other people's tips.
Blind people's perception of the world
The first is hearing. The sound emitted from different positions is different in size. Visually impaired people can judge the distance of the object or person making the sound through the sound.
The second is sense of smell. People with visual impairment can judge the existence of things by smelling, the depth and type of smells. People who are born blind need to learn the day after tomorrow to remember the different smells of different things, but people who are born blind don't need it.
There is also touch. No matter the elevator or the sidewalk, there are signs with different shapes protruding from the surface to help the blind perceive, but it is necessary to learn the meaning of these signs.