Blue light is a section of the visible light spectrum within 380nm - 500nm. It has shorter wavelengths than other visible light and is thus easily scattered. When blue light hits the retina, a significant amount of energy is absorbed, leading to digital eye strain, headaches and sleep apnea.

Blue light in the morning isn't so much an issue as it stimulates cortisol production to keep us alert. 

However, in a world where night turns to day with the flick of a switch with LED’s, we have a big problem: Too much blue light can be harmful. It is vital to strike a balance in our exposure to blue light and to take steps to protect our health from its damaging effects.

Artificial lighting such as LED's (screens, headlights, lamps, downlights etc.) emit high amounts of isolated blue light. (See 'What is blue light?' above).

Modern light emittance peaks 440nm, with device lighting at 455nm. Melanopsin is most sensitive at 430-45nm and triggers a daytime response in the endocrine system (hormonal system).

This means that our circadian rhythm becomes disrupted. In addition, the lack of UVA/B and near-infrared light (which we only get from the sun) means the cell regeneration response becomes blunted, meaning ocular cell death that can lead to visual problems.

Circadian rhythms are the natural daily fluctuations in biochemical, physiological, and behavioural processes that occur in living organisms. These rhythms follow a roughly 24-hour cycle and are driven by an internal biological clock.

The term “circadian” comes from the Latin words for “around” (circa) and “day” (diem). Circadian rhythms are found in most living things, from bacteria and plants to animals.

In humans, circadian rhythms play a role in many aspects of our physiology and behaviour, including sleep-wake cycles, hormone release, body temperature fluctuations, and metabolism.

Circadian rhythms are essential for our health. Disruptions to our natural sleep-wake cycle can lead to sleep disorders and have been linked to obesity, diabetes, depression, and other health problems.

Exposure to artificial light at night can disrupt our circadian rhythms and lead to sleep problems. To promote good sleep and protect our health, limiting our exposure to artificial light in the evening and sleeping in complete darkness is essential.

Our lenses are designed and manufactured by leading specialists in the UK, packed full of technology you won’t find anywhere else. Each pair of lenses goes through a 20 stage process to ensure you are protected from harmful HEV light.

Here are a handful of features our lenses boast:

- Anti-reflective coating

- Anti-static coating (prevents dust) 

- Anti hydrophobic coating (prevents water)

- ‘Green coating’ is made by nine layers of treatment applied to the lens, meaning clearer images without glare and a longer period without eye strain. 

- CR39 lens as standard

Melatonin is a hormone that is produced by the pineal gland in the brain. It is best known for its role in regulating sleep patterns, allowing us to drift off and stay asleep, but melatonin also has important immune system benefits. 

There are a few ways in which melatonin can help to boost immunity. Firstly, it can help increase the production of specific immune cells, such as natural killer cells and cytokines. These cells play a vital role in fighting off infection and helping the body heal. 

Secondly, melatonin has been shown to have anti-inflammatory effects. Chronic inflammation can weaken the immune system and make it more susceptible to disease. Finally, melatonin can help to protect the body from oxidative stress. This condition is caused by an imbalance of free radicals and antioxidants in the body, which can damage cells and lead to inflammation.