Blue Light

Plain-English guides to blue light — what it does to your sleep and eyes, when it helps, when it hurts, and what’s actually worth doing about it.

Text on a peach background reads: Do Blue Light Blocking Glasses Work? We Examined the Evidence. Below is a small brain icon and the words Optimize Your Biology. White dashed lines and arrows decorate the background.
Blue Light

Do Blue Light Blocking Glasses Work? We Examined the Evidence

October 17, 2023

Text graphic with an orange background that says, “How to Block Blue Light on Your iPhone and Automate it!” Above the text “Optimize Your Biology” with a small brain icon. White dashed arrows point to the main text.
Blue Light

How to Automate Red Light Mode on iPhone (Triple-Click Trick)

May 3, 2023

Yellow background with bold black text reading The Ultimate Guide to Testing Blue Light Glasses at Home. Below, a small brain icon and the words Optimize Your Biology. Two white arrows point toward the text.
Blue Light

3 Ways to Test Blue Light Glasses (The “Pen Test” is Fake)

April 22, 2023

Illustration of a cozy attic bedroom with string lights, a bed, nightstand, and shelves. Large window shows a starry night sky. Text reads, Best Lights for Sleeping.
Blue Light

Best Color Light for Sleep: We Tested Down the Top Options

March 3, 2023