Blue Light and Eye Health

Blue Light and Eye Health

We know how important it is to protect our eyes from UV rays, but what about the effects of blue light rays?

What is blue light?

Sunlight, or white light, is made of a spectrum of different coloured light rays with different wavelengths. Light rays with longer wavelengths carry smaller amounts of energy, and shorter wavelengths carry larger amounts of energy. Blue light has shorter wavelengths and so carries higher amounts of energy when compared to other parts of the visible spectrum, with a key function being linked to its impact on the sleep/wake cycle through regulation of the Circadian Rhythm.

Blue light is present everywhere

Blue light can come from natural daylight, artificial lighting and digital devices. When outside, blue rays from the sun travel through the atmosphere. Artificial sources include energy efficient LED lighting as well as digital devices such as tablets and mobile phones, albeit on a much lower level.

Regulating the impact of blue light

Whilst research to understand the effects of blue light continues, there is evidence to suggest that using screens around bedtime can contribute to disrupted sleep patterns. This is potentially because blue light has been linked to the suppression of melatonin, a hormone key to sleep/wake regulation. However, a number of other factors can also contribute to sleep disruption.

Some people report that MAR coatings that filter unwanted blue light help to alleviate the impact of blue light on sleep whilst also providing more visual comfort. KODAK BluProtect has been specifically designed with this in mind, efficiently managing light rays and leading to more comfortable viewing over longer periods of time. The lens coating delivers improved contrast, enhances visual sharpness to better define objects and detail in lower light conditions. KODAK BluProtect also helps to reduce glare caused by blue light, enabling your eyes to better adjust to lighting conditions

Speak to your optometrist today to find out more.
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