What is blue light?

Blue light is the short-wavelength visible light including UV light which is all around us.

But a small band of waves, known as visible light, can be detected by the human eye. Visible light waves vary in length from 380 nanometers (violet light) to 700 nanometers (red light).

​

What produces blue light?

Sun emits blue light

Fluorescent and incandescent bulbs

Human beings are exposed to more blue light than ever because of the widespread use of devices that rely on light-emitting diode (LED) technology.

Computer and laptop screens, flat-screen televisions, cell phones, and tablets all use LED technologies with high amounts of blue light.

​

What does blue light do to your eyes?

Blue light and digital eyestrain

• Using digital devices up close or for long periods can lead to digital eyestrain.

• People using computers, laptops, and other digital devices, tend to blink less often than normal. Fewer blinks can mean less moisture.

• When your eyes are strained from staring at a blue-light-emitting screen, you might notice:

  • dry eyes

  • sore or irritated eyes

  • tired eyes

  • headaches

  • facial muscles fatigued by squinting

Blue light and sleep

• people are exposed to blue light in the evening hours, their bodies don’t release as much melatonin (sleep-inducing hormone), and their sleep cycles are delayed or disrupted.

Blue light and eye diseases

• Age-related macular degeneration is the number one cause of sight loss in people over 50 years old

• Animal studies and lab studies have raised questions about whether blue light could speed up the process of macular degeneration

​

​

​

​

​

​

​

​

​

​

​

​

How to limit blue light exposure?

Blue light/ UV blocking lenses is the option to protect your eyes from consequences due to exposure.

​

Blue Light/ UV blocking lenses:

Blue-cut lenses are designed to absorb over 90% of blue light. (Below 420 nanometers which are more harmful)

Blue light is visible light with high energy in the range of 380 nanometers to 495 nanometers. This type of lens is designed to allow some blue light to pass through to prevent color distortion.

• Blue light blocking lenses filter out the sun’s harmful UV as well as harmful blue light.

• These lenses block harmful high-energy blue light from all light sources and digital devices.

• Filters out 100% UVA and UVB rays

• These lenses are available with various lens designs and coatings.

• Regular plastic eyeglass lenses block most UV light, but adding a UV-blocking lens boosts UV protection to 100 percent for added safety.