Wavelengths of electromagnetic particles make up the electromagnetic spectrum. Within this spectrum there are visible and non-visible light. Blue light is a color in the visible light spectrum that can seen by the human eye.
Most light is beneficial for a healthy lifestyle but, there is harmful light also, namely, ultraviolet (UV) and blue-violet light, known as high-energy visible light (HEV).
As the diagram below shows, the harmful light is split into UV lightwhich can cause cataract and blue -violet light, which can cause age-related macular degeneration.
Sources of Blue-Violet Light
The main source of harmful blue-violet light:
Tablets and iPads
Florescent and LED lighting
Natural exposure from the sun
The vast majority of today's electronic devices use LED back-light technology. LED lighting emit very strong blue-violet light waves.Therefore, as devices increase in popularity, the health risks associated with Blue-Light do too.
Why block blue-violet light?
By adding a blue-violet blocking filter to your prescription eyewear or to a cosmetic frame you are taking preventative measures against its harmful effects, namely:
Disruptions to the circadian rhythm
Digital Eyestrain Syndrome: blurry vision, difficulty focusing, dry and irritated eyes, headaches, neck and back pain
Increased risk of depression
Greater risk of certain types of cancers
Greater risk of diabetes, heart disease, and obesity
May cause permanent eye damage; may contribute to age-related macular degeneration which can lead to vision loss*
* The damage caused by blue-violet light is degenerative. Thus AMD classifies as an age-related disease. AMD is an incurable eye disease. Meaning, one day in the future you may be diagnosed with AMD without ever knowing you had exposed your eyes to this disease.
If you are using a digital screen, exposed to fluorescent and LED lighting, or watch TV for a period greater than two hours a day, then you should strongly consider protective measures against blue-violet light, regardless of your age.
If you are 50 years or older you are highly susceptible to Age-related Macular degeneration (AMD), a leading cause of vision loss in older people. Prevent from further damage immediately. Adding a blue-violet light blocking tint to your prescription eyewear helps prevention.
If you are younger than 50 years, health specialists strongly advise to protect against blue-violet. Wearing a blue-violet light blocking tint to your prescription eyewear or a blue-violet light blocking tint to cosmetic eyewear is an easy preventative measure - you are never too young to protect yourself!
Take preventative measures
You can protect against harmful blue-violet light by having a blocking filter added to your prescription eyewear. Or, if you do not require a prescription lens, to a cosmetic frame. The filter is clear and does not tint the lens blue.
Taking preventative measures now will aid in preventing AMD, in fact, the earlier you protect your eyes, the greater the chance of reducing the health risks.
I am over 50 years, is it too late to protect against harmful blue light?
It is never too late, by adding a blocking filter you will stem blue-light damage, which could significantly delay immanent vision loss. Age is a major risk factor for AMD as the disease is most likely to occur after the age of 60. Above all, protecting your eyes against harmful blue light now will reduce the negative effects from blue-light exposure. You will also instantly enjoy the beneficial effects of wearing a blocking filter. Namely, boosting alertness, improving memory and cognitive functions, and help regulate circadian rhythm, the body's natural sleep and wake cycles.
I am in my 20's, surely I have no need to protect against a disease that occurs in my latter years?
Permanent eye damage from blue-violet light exposure is age-related. But, it's important to remember that the younger you are, the more likely you are to the exposure of a device emitting harmful blue-violet light. If you were born in the 70's you wouldn't have experienced exposed to digital devices until you were in your late teens. If you are in your 20's you have probably experienced exposure to digital devices most of your life so it's plausible that vision loss, due to blue-light damage, could occur much, much earlier. Wearing glasses with a blocking filter will stem the damage of harmful blue-light and improve the body's natural sleep and wake cycles.