Modern screens emit high-energy visible (HEV) blue light, which can penetrate deep into the eye. While blue light is natural during the day, excessive exposure—especially at night—can lead to several issues: What is a Blue Light Filter & How Does It Work? - Lenovo
To protect your eyes from the high-energy blue light emitted by screens, you can download a (often called an "Eye Protector") to adjust your display's color temperature to warmer, eye-friendly tones. Why Download an Eye Protector Blue Light Filter? download eye protector blue light filter