Each day we knowingly enter into different environments whether they are outside in nature or inside in the power grid, behind glass, illuminated by man made lighting where we view screens and devices. As we move in and out of these and progress through daylight, light exposures in our eyes change dramatically. Blue light exposure becomes a hot topic as it is closely linked with our hormone panel and melatonin which as we know are two very important pieces of our biology. There are many links with blue light which we will expand on in future blogs.
So with our changing light environments, it then becomes important to understand the differences in these lighting conditions and when to use glasses, when not to and which types. But first the golden rule, never use these glasses outside in natural daylight, here we want the full spectrum of light from the sun to do what it is supposed to, so no yellow or red glasses outside.
Our collection of yellow lens glasses are called BluePeak, named because they lower the peak of blue light. All our yellow lens glasses remove a portion of blue, not all. Depending on the type, they reduce blue light by between 30 to 60%. When we talk about levels here, we mean the colour temperature which is measured in kelvin (K). You might recognise this number if you have bought LED lights and the packaging says 2700K, that is the colour temperature. The higher the number, the brighter the light. Just to give you a little insight into natural blue light. When the sun comes up in the morning, sunlight is about 1500K and this increases throughout the day up to a massive 27,000K depending on your location or latitude. Compare this to a typical computer screen which runs at about 6500K. Our eyes recognise sunlight throughout the day as a point in time because the sun calibrates us and acts as an internal diurnal clock setter.
So, back to glasses, Rama yellow BluePeak glasses are for indoor use during the day. They are especially good in a work environment when you are under artificial lighting while using a computer. In modern offices, the lighting has high levels of blue light and windows that let in unbalanced blue light also. If you spend time at home on the computer, watching TV or cooking in a LED lit kitchen, during the day, Rama BluePeak will do the job. What we also need to be mindful here is that we still need the light from outside, so it is always useful to take breaks outside to get natural light in your eyes for the reasons above.
For those darker hours or nighttime we have the red lens SleepWell collection. So named because, well, they help you sleep well. An absolute must if you have artificial light either illuminating the room or light from a screen. The mantra we have here is, when the sun goes down, the red glasses go on. Why? Because there is no natural blue light after the sun sets. Using computers, devices or LED lights at night, the blue light portion is very strong and has a damaging effect to our eyes and other biology. One of the first warning signs we have here with too much blue light are headaches and disturbed sleep. Our SleepWell glasses protect eyes from eye strain and melatonin from being destroyed allowing you to have that rich deep sleep we all need. Deep sleep means feeling more refreshed in the morning, you also have the repair and regenerative benefits as well. More on this to come in another blog. A word of caution, these darker lenses are not for driving at night. If we block the blue while we are driving, you may become drowsy as we lose blue light stimulation and cortisol drops off.
Using yellow lens glasses for driving has some advantages with removing the dazzle and brightness from vehicle headlights. Many modern cars now have LED daytime lights and LED headlights which contain a high level of blue light.
In an ideal world, we have different glasses for the different occasions. I personally use yellow through the day if I'm on my computer and as it gets darker my red lenses go on. I have been doing this for probably about 3 years now and above all, my biggest benefit has been absolutely fantastic sleep. I have no issues getting to sleep and I get up in the morning feeling a lot more refreshed that I used to. I was a someone who paid no attention to blocking blue light at night, I spent hours on my computer with a TV on and LED lights and I always struggled with my sleep.
As a little sideline story. I attended an Expo recently where I ran a stand selling Rama glasses and on a cosmetic stand next to us, a young lady popped her head around the partition wall to tell us about her blue light glasses experience. She told us that while studying hard for exams she struggled with sleep and after trying medication and other treatments a kind doctor mentioned using blue light glasses. She bought some and it turned her life around, she slept better, had better concentration and her health improved. Amazing!