You can activate Wind down mode to reduce eye strain before sleeping and prevent your sleep from being disturbed.
• Greyscale: Displays colors on the screen as grey tones
• Do not disturb: Set the device to mute incoming calls and notification sounds, except for allowed exceptions. CF.) Night
mode (Settings > Display > Night mode) also can reduce eye strain by applying the dark theme when using the device at night or in a dark place. However the dark theme may not be applied in some Apps and Home/lock screen