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Visible light is part of the electromagnetic spectrum and is measured in nanometres (nm). The visible light spectrum includes the colours we can see, ranging from violet and blue light at shorter wavelengths to red light at longer wavelengths.
Blue light sits at the high-energy end of the visible spectrum, typically around 400-495 nm. It plays an important role during the day, but too much artificial blue light in the evening can interfere with the body’s natural wind-down process.
Blue light comes from both natural and artificial sources. Sunlight provides blue light as part of a balanced full-spectrum light, while screens, LED lighting, phones, computers, tablets, and TVs can expose us to artificial blue light throughout the day and evening.
Sunlight contains a broad, balanced spectrum of light, including blue, green, yellow, orange, red, and near-infrared wavelengths. This natural variation changes throughout the day and helps support your sleep-wake rhythm.
During the day, blue light from the sun helps signal alertness and wakefulness. Toward sunset, the light becomes warmer, with less blue light and more longer-wavelength light.
Modern artificial light from screens, LED lighting, phones, computers, tablets, and TVs can expose us to blue light long after sunset. This is especially relevant in the evening, when the body naturally prepares for rest.
While artificial light is part of modern life, reducing blue light exposure at the right time can help support a healthier evening routine and better sleep quality.
Natural light changes throughout the day. It is brighter and cooler during the morning and daytime, then warmer in the evening as the sun sets. Artificial light, however, often stays bright and blue-rich throughout the day and night.
This is why timing matters. Blue light can be useful during the day, but in the evening it can make it harder for your body to wind down naturally.
Reducing artificial blue light exposure after sunset can help support natural melatonin production and a more consistent sleep routine.
Filter Optix blue light filtering technology is designed to help you manage modern light exposure, from daytime screen use to evening routines and sleep support.
Filter Optix lenses are developed to filter specific wavelengths of artificial blue light while maintaining optical clarity, visual comfort, and everyday performance.
Our four lens colours are designed for different times of day and different levels of light filtering: Clear, Yellow, Orange, and Red. Clear and Yellow lenses are made for daytime screen use, while Orange and Red lenses are designed for evening routines and sleep support.
Each lens also features an advanced multilayer coating with anti-reflective, anti-static, hydrophobic, oleophobic, and scratch-resistant properties.