What is Blue Light?

Blue Light is the specific section of the visible light spectrum that can have harmful effects to our eyes and sleep.
Electromagnetic Spectrum (Blue Light)

There are two distinct sources of Blue Light:

Sunlight. Danger when looking directly into the Sun.
Artificial blue light is emitted from LED lighting and from digital devices. Our close proximity to the device when viewing, especially over long periods of time, means that the harmful blue light can affect us and our children’s wellbeing.

Benefits to young and old alike

Here is a brief explanation of how Blue Light affects us: we are born without any of the protective Ocular Lens Pigment (OLP) present in the eye. OLP begins to form in the lens of the eye in the late teenage years. At the same time, the amount of melanin gradually lessens. Hence children not in there teenage years who are exposed to increasing amounts of Blue Light should be protected.

As part of the eye's natural defence mechanism, both melanin and OLP selectively limit the amount of Blue Light that reaches the retina, protecting it from Age-related Macular Degeneration (AMD). AMD is an eye disease where central vision is lost. When we get older, the low levels of melanin and the replacement of the lens, due to cataracts, means that older patients are now exposed to higher levels of blue light with a greater risk of AMD.


For information on the macular and AMD, click here.
Conclusive evidence has show that night-time exposure to blue light keeps us up late.

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