Between 6 and 9 hours everyday, we situate mobile devices in the center of the visual field, while objects around the screen appear blurry, which can trigger the process of lengthening of the eye, and cause myopia.
High light level conditions, such as are experienced in outdoor activities can protect the eyes against myopia. Your phone can remind you to go out and benefit from the light outside.
The more time we spend at near work, the greater the probability of myopia development due to the process of excessive lengthening of the eye.