All I know is that I have absolutely been sleeping better since I started using a blue light filter.

“For the past decade, scientists have been exploring whether artificial light — particularly wavelengths of blue light — poses a risk to human health.

“You may have heard that too much screen time in the evening is a bad for you, and it’s true the blue light emitted by devices like phones and tablets can disturb your sleep.

“But blue light is not all bad — and here’s why.

“In 2002, scientists identified a new type of photoreceptor cell in the eye, when the visually blind mice they were studying were still able to respond to certain wavelengths of light.”

Read more at ABC News