The best distance to watch TV: 2.5 ~ 8 meters
The closer a person is to the TV, the greater the stimulation, and the easier it is to cause eye fatigue. Therefore, the placement of TV sets should be based on the physiological requirements of the eyes. The best position is that people are 2.5 ~ 8 meters away from the TV, and the height is slightly lower than the horizon of the eyes. When it is too high, looking up is easy to cause fatigue; It is easy to get tired when it is too low, because you need to bow your head. Of course, we should also be careful not to put the TV set too obliquely, otherwise, looking sideways will not only make the image unclear, but also cause eye fatigue more easily. When watching TV, take a short break, no more than 60 minutes at a time, preferably with your eyes closed. It has been investigated that watching TV for more than 4 hours without rest will lose two lines of vision (0.2). Watching TV for a long time is not only easy to make children weak and obese, but also easy to form myopia. If you are a nearsighted child, it is best not to watch TV for more than half an hour at a time, but to rest for 10 minutes.
In addition, when watching TV, keep a certain brightness indoors. In other words, the contrast between the brightness of the TV and the brightness around the room should not be too big, otherwise it will easily cause eye fatigue and promote the formation and development of myopia. Therefore, a low-level lamp should be placed indoors, and the brightness should be appropriate to see the handwriting on the book clearly.
The best distance to watch TV should be 5-7 times the height of the TV screen. For example:
The viewing distance of a 20-inch (5 1CM) color TV should be 3.1m.
The viewing distance of 2 1 inch (54CM) color TV should be 3.4 meters.
The viewing distance of 25 inches (64CM) should be 3.8 meters.
The viewing distance of 29 inches (74 cm) should be 4.5 meters.
The viewing distance of 34 inches (86 cm) should be 5.2 meters.
In addition, when watching TV, keep a certain brightness indoors. In other words, the contrast between the brightness of the TV and the brightness around the room should not be too big, otherwise it will easily cause eye fatigue and promote the formation and development of myopia. Therefore, a low-level lamp should be placed indoors, and the brightness should be appropriate to see the handwriting on the book clearly.
Cubic diagonal, I hope it is useful to you, thank you.