Night Swannies are the most scientifically validated blue light blockers and have been proven to improve sleep factors in several independent studies. You can read more about these at swannies.com/science.
Many glasses that claim to be blue light blocking glasses on the market are just orange tinted glasses no different to ballistic safety goggles. These glasses provide a small amount of protection against blue light as orange color alone is not sufficient to filter the whole range of the blue light wavelength. Other glasses have no tint at all and can therefore only ever be effective at blocking a very small part of the blue light spectrum, if at all.
Swannies Blue Light Blocking Glasses are FDA registered and have been extensively researched, designed and manufactured specifically to block the full spectrum blue light by combining a specific colored tint with special AR coatings which work together to effectively filter out blue light.
Swannies are made with top quality acetate frames with spring hinges and top of the line CR-39 lenses with UV rated anti-glare coating on both front and back. We are confident that you won't find better quality blue light blocking glasses on the market.