Dell monitor ComfortView: low blue light preset for migraine days

Updated 2026-11-02

Quick answerMany Dell monitors have a ComfortView preset that Dell describes as reducing blue light emitted from the screen. Open the monitor's on-screen menu with the joystick or buttons, go to Preset Modes and choose ComfortView. Lower the monitor brightness there too: hardware brightness lowers the backlight itself, unlike software filters.

Turn on ComfortView

  1. Press the monitor's menu button or joystick.
  2. Open Preset Modes.
  3. Select ComfortView.
  4. Lower Brightness in the Brightness/Contrast menu.

Good to know

  • Exact menu names vary by model; the S2421H user's guide is linked in Sources.
  • Software dimming in the browser cannot change the backlight or its flicker.

FAQ

Does ComfortView help migraine?

Dell presents it as a low blue light mode for comfort; it has not been tested for migraine.

Hardware or software brightness?

Hardware brightness lowers the backlight; software filters only darken the image.

Sources

  • Dell S2421H Monitor User's Guide (ComfortView preset). Link
  • Noseda R, … Burstein R. Migraine photophobia originating in cone-driven retinal pathways. Brain, 2016. Link
  • Investigation of the optimum display luminance of an LCD screen under different ambient illuminances in the evening. Applied Sciences, 2021. Link

Not a medical device and not medical advice. Migraine Mode is a screen-comfort tool: it does not diagnose, treat, cure or prevent migraine or any other condition, and it does not replace a doctor. Its settings are based on studies of light, colour, flicker, patterns and motion; the extension itself has not been clinically tested. When to see a doctor.