In order to prevent myopia, how much is the distance between the eye and the screen when watching TV

In order to prevent myopia when watching TV, the distance between the eyes and the screen is recommended to be more than 3 meters.

Under normal circumstances, the distance between the eyes and the screen should be more than 3 meters when watching TV, and the line of sight should be parallel to the display screen. The continuous use of the eyes should not exceed 40 minutes.