There are many cheap clear, yellow, orange, and red-tinted glasses in the market. The clear blue blockers, cheap and expensive don’t work at all because they block the blue light that is not emitted by the led screens and bulbs.  About 90% of the yellow-tinted glasses block a lot more than what’s needed. This causes you to feel sleepy and tired during the day. Also, not all orange and red-tinted glasses are created equal. Even though the orange glasses are surely to block the blue light and the red lenses are sure to block the blue and green light, however the percentage of the blue and the green light blocked at a given frequency can be dramatically different. 90% of the glasses we tested in the market still allowed 3 to 20% of light to pass through at any given frequency (in the blue and green light range). This is called light ‘’leakage’’ and is detrimental to your sleep and circadian rhythm.  The clip N go is the first and most advanced 3 lens circadian light therapy glasses that are designed to balance out the artificial light that arrives at the eyes from daytime, to evening, to nighttime in a scientific way that is in alignment with the latest circadian research. We also use the most ethical and eco-friendly processes. Our frames are made from FSC-certified wood ensuring that the wood is sustainably harvested. We also use the highest quality, optically optimized lenses and we are proudly collaborating with a carbon-neutral lab in Canada that operates on geothermal and solar energy!