Every day, people all over the world are exposed to blue light emitted by the sun, LED lights, fluorescent lighting and computer screens.
It has long been known that blue light causes eye strain and disrupts circadian rhythm, affecting our sleep patterns. Now, researchers are studying whether an excessive amount of exposure to blue light poses other risks to eye health.
How Does Blue Light Affect The Eye?
Each visible light color has a unique energy level and wavelength. Since blue light has a short wavelength and higher energy, it can penetrate into the retina at the back of the eye.
Studies have shown that the retina’s light sensitive nerve cells can be damaged when exposed to excessively high levels of blue light. Researchers are studying whether the blue light emitted by digital devices like computers, cell phones and tablets is enough to qualify as excessive exposure that could result in eye diseases like age-related macular degeneration.
What is certain is that blue light contributes to digital eye strain, since blue light has more energy. This exacerbates the scattering of light when it enters the eye, compared to other light rays. As the scattered blue light rays enter the eye, they create ‘visual noise’ — the eye has difficulty accurately focusing the light.
Symptoms of digital eye strain include:
- Blurred vision
- Back, neck, and shoulder pain
- Frequent need to blink or rub your eyes
- Dry eyes
- Headaches and eyestrain
- Trouble with accommodation (focusing between near and far)
How Do Lutina Lenses Protect Your Eyes from Blue Light?
Lutina lenses, developed by Tokai Optecs, are lenses – not a coating – that have the ability to cut UV-rays, just like other lenses. However, unlike other lenses, they can absorb blue light (light between 400 to 420 nm). This further decreases the scattering effect of the blue light in the eye.
Another benefit of the Lutina lens is that it can protect the retina, as blue light can cause damage to the retinal nerve cells through a process known as ‘oxidative stress.’ Lutein is one of the three pigments that are present in very high concentrations in the retina. Reducing the amount of blue light hitting the retina effectively reduces the oxidative stress and damage to the lutein, therefore protecting retinal health.
For more information about the effects of blue light and how Lutina lenses can help keep your eyes healthy, contact Washington Eye Doctors in Washington, D.C..
At Washington Eye Doctors, we put your family’s needs first. Talk to us about how we can help you maintain healthy vision. Call us today: 202-335-5032 or book an appointment online to see one of our Washington, D.C. eye doctors.
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