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Sunglasses VS. Spectacles: What’s the Difference?
Eyeglasses, spectacles, sunglasses—these are just some of the terms associated with eyewear. Long ago, we used the term “spectacles” to refer to eyewear that helps us see better. With time, “spectacles” fell out of fashion and were replaced with “glasses”. However, the word “specs”, the shortened form of “spectacles”, seems to be making a comeback in recent years. Sunglasses, on the other hand, are fashion items that made their way into modern fashion. With all these closely related terms, it can get confusing sometimes which is which.
Once and for all, it’s time to clarify the differences. Spectacles are prescription glasses with specialized lenses that correct many kinds of vision problems. There are many types of frames and lenses that you can choose from to fit your lifestyle. On the other hand, sunglasses, as stated above, are modern-day fashion items that protect the eyes from the sun. You no longer have to choose between your specs and sunnies when you’re out on the beach because prescription sunglasses are now available to you.
Blu Light
What is Blue Light
Our surroundings are pulsing with electromagnetic energy. This energy travels as waves that vary in length. While most electromagnetic waves are invisible, visible light can be perceived and detected by our eyes.
Because of the short wavelength of blue light, it transmits greater energy. In fact, high-energy blue light is nearly as powerful as UV rays. This makes blue light harmful to the eyes.
Risk and Side Effects of Blue Light Exposure:
Although the severity that it poses to eye health is still studied by researchers, exposure to blue light, especially for prolonged periods of time, can be harmful and is associated with many eye problems.
Blue Light and Macular Degeneration
Age-related macular degeneration (AMD) is the leading cause of vision loss and low vision among individuals 50 years old and above. This happens because as one gets older, the macula—the structure at the back of your eye—deteriorates. Prolonged exposure to blue light can aggravate and speed up this process.
Blue Light and Digital Eyestrain
Blue light scatters more easily than the other colors of the visible light spectrum. Its higher energy and shorter wavelengths created a less consistent flow of light, resulting in glare or flickering images. This reduces sharpness and visual contrast. Because of this, the eyes have to work harder to see clearly. This will result in eye strain, which is commonly characterized by headaches, blurred vision, and dry eyes
Blue Light and Sleep
Blue light scatters more easily than the other colors of the visible light spectrum. Its higher energy and shorter wavelengths created a less consistent flow of light, resulting in glare or flickering images. This reduces sharpness and visual contrast. Because of this, the eyes have to work harder to see clearly. This will result in eye strain, which is commonly characterized by headaches, blurred vision, and dry eyes
Health Benefits of Blue light
With all the fearmongering about blue light and its effects, it is important to note that blue light exposure is not all bad news. Blue light, especially in its natural form found in the environment, provides us with several health benefits. It helps regulate our body’s circadian rhythm. Humans are diurnal beings, and blue light keeps us awake during the day. It also boosts memory and cognitive functions.
How to Limit Blue Light Exposure
Here are some tips to limit your exposure to blue light:
- When using digital devices, practice the 20/20/20 strategy.
- Keep your eyes moist using eye drops and room humidifiers.
- Use eyeglasses with the right prescription.
- Turn on the “night shift” setting of your screen.
- Use blue-blocking glasses when working in front of a screen for long periods of time.
Digital Progressive Lenses
Progressive lenses are a type of multifocal lenses that offer an effective and aesthetic solution to people with presbyopia or age-related near vision loss. Instead of having a visible line bisecting standard bifocal and trifocal lenses, progressive lenses offer a seamless and gradual change in lens power as you look down. These lenses provide a smooth transition of focal powers for near, far, and intermediate vision.