What can excessive screen time lead to in terms of vision?

Excessive screen time can lead to computer vision syndrome, commonly referred to as digital eye strain. This condition encompasses a range of symptoms that arise from prolonged use of digital devices, such as computers, tablets, and smartphones. The symptoms may include headaches, blurred vision, dry eyes, and discomfort. The primary reason for these symptoms is that extended screen time often leads to reduced blinking rates, causing the eyes to become fatigued and dry, as well as engaging in prolonged focus on near objects, which can strain the eye muscles.

In addition, the blue light emitted from screens can contribute to visual discomfort and may affect circadian rhythms. While many individuals may notice temporary improvements in vision, such as enhanced focus when they first start using screens, sustained usage can lead to long-term discomfort and strain which defines computer vision syndrome. This phenomenon highlights the importance of taking regular breaks and practicing the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds to reduce strain on the eyes.