You will probably have seen that most blue light blocking glasses have clear lenses whilst some have orange lenses. What's that about?
Put simply: clear lenses block small amounts of blue light during the day to help prevent eye-strain, headaches and a feeling of being "wired". Wear these if you're on a screen for a long time or in poor quality lighting such as fluorescent lights.
Orange lenses on the other hand should be worn before bed. Blue light signals to your body that it's daylight and therefore the body does not need to produce the sleep hormone, melatonin. Zees orange lenses stop over 99.9% of the blue and green light which allows your body to naturally produce melatonin which means a better sleep.
Here's sleep expert Olivia Arezzolo to explain...