You may have been on a Zoom or Facetime call and noticed someone’s eyeglasses have a blue tinge to them. What is this for and should you add this the next time you change up your glasses? We asked the team at Dr. Specs Optical in Kelowna for their advice.
What is Blue Light?
Blue light is in the middle of the light spectrum. It’s the visible light that has the shortest wavelength and the highest energy. It ranges from 380-500nm (nanometers). Blue light is different from other visible light because it can reach the retina all the way to the back of one’s eyes. Blue light has many similar qualities to UV rays, but luckily UV rays can be blocked by sunglasses.
What Emits Blue Light?
Sunlight is a major source of blue light, but what we are more concerned about these days are technological devices that emit blue light and that we look at every day for long periods of time – devices like TVs, smartphones, and computer monitors.
So What Is The Big Deal?
There is growing concern about the possible long-term effects from blue light. In the short term, exposure to blue light, especially at night, can disrupt sleep cycles, potentially causing fatigue at work. Too much exposure to blue light through screens can cause digital eye strain, with symptoms like blurry vision, headaches, ocular migraines, and dry eyes. If you are looking at screens for many hours per day, we recommend adding a blue light filter to your prescription glasses.
How Does It Work?
Blue light filters on glasses work by blocking some of the high-energy blue light we get exposed to. This is a special coating on top of the glass that reflects some of the blue light. The percentage reflected can be in a range, so it’s important to discuss your screen time with the professionals at Dr Specs Optical. Some blue light eye filters add a yellow tint, while others look clear. Lenses that look more yellow tend to filter more blue light and can be quite stylish. Note that some blue light, in the right amount, is healthy and can boost alertness, help your memory, and elevate your mood. Exposing yourself to blue light during daytime hours can also help maintain a healthy sleep cycle.
What are the benefits of a blue light filter?
The major benefits for adding the blue light filter may be reduced eye strain and better sleep. After prolonged use of your devices and exposure to blue light, have you felt your eyes might be strained or dry? Having trouble sleeping? Having a blue light filter may help.
Talk to Our Team
Blue light filters are an important consideration the next time you are in to buy eyeglasses. Our trained eye doctor will discuss your concerns and may recommend them to suit your specific situation. At Dr. Specs, we are experienced in improving the vision of our customers, and we know what is good for you. We do it at affordable rates too. Contact us today!