Are Blue Light Glasses Bad for Your Eyes?
After learning some basic information about blue light blocking glasses, are blue light glasses bad for your eyes? No, the blue light glasses would not damage your eyes. Blue light blocking glasses can protect your eyes from harmful blue light and UV rays by using special lens technology to block and filter them out.
Sunlight contains the full spectrum of visible light including red, orange, yellow, blue, indigo and violent, and also non-visible light such as ultraviolet and infrared. A moderate amount of blue light and UV rays can be beneficial for us, but too much can damage our eyes.
Are progressive lenses good for driving?
Progressive lenses can help you see close, far, and anywhere in between. That means progressive lenses are good for driving. So you don't have to change your glasses on the way. With progressive lenses, you can easily see all distances. Standard lenses are more affordable than premium lenses, but premium lenses offer a wider field of view and are ideal for drivers.
What Do Blue Light Glasses Do?
Blue light has wavelength and energy from 380 nm with the highest energy to 500 nm with the lowest energy. The violent and blue-violent rays are more likely to damage our eyes so these rays are also called harmful blue light.
The blue light can be from the sunlight, fluorescent light, LEDs, computer monitors, smartphones, and tablet screens. Long time exposure to blue light may cause eye strain and discomfort. Hence, wearing blue light glasses is an effective way to prevent your eyes from harmful blue light.
What do blue light glasses do? They are specially designed to filter out harmful blue-violent light rays that are commonly emitted from digital screens.
The glasses are too loose or too tight at the temple.
If your glasses are too tight on your temples, you will feel uncomfortable. On the other hand, if your frames are too loose, it can make you look not energetic. Either way, you can adjust the frames at home to make them more comfortable. If the arm squeezers your temples. If the frames are metal, hold your lenses in place with your less-used hand. Use your dominant hand to gently press outwards on the corner of the frame, between the hinge of the frame and the lens. Repeat this step on the other side of your body to make your temples looser. If the frame is too loose from the temple. Again, for metal frames only, use the same method as you used to relax the frames, but apply slightly inward pressure on the corner between the hinge and the lens. Repeat on the other side, tightening the fit around the temple. Adjusting the temples of rimless, half-rimless, or plastic frames can break them. You are advised to take these frames to the optical shop for adjustment.
What Are Bifocal Glasses?
Bifocal lenses are divided into two parts to accommodate two different prescriptions in one lens. One area of the lens will have one prescription (usually distance) and a segment in the lower half will have the other (usually near vision).
Bifocal glasses are most used to correct presbyopia - an age-related eye condition where the eyes begin to struggle to focus on anything up close. This difficulty usually results in people requiring glasses with two different prescriptions, one for short and one for long-distance.
On bifocal glasses, there is a distinct line between the different prescriptions. Wearers have to look up and down to switch between the prescriptions they need, with long-distance prescriptions at the top and near vision at the bottom.
Why are rimless glasses so expensive?
Rimless glasses are the design vantage point in the frame of glasses. The structure of rimless glasses requires many higher physical features (flexibility, surface texture, etc.) and machining accuracy than TR, PEI, and other materials. In order to ensure comfortable wear, the common materials are very exquisite. And for processing technology, the frame is the most difficult. It's not just grinding, it's a full polishing, and it's perforating. This is the technical demand and the most time-consuming.
What is a drop ball test?
The Drop Ball Test, known as the Basic Impact Test, is an Impact Test administered by the Food and Drug Administration to determine the safety of eyeglasses. Eyeglasses (sunglasses, exercise glasses, near-sightedness glasses, reading glasses, etc.) are a category of medical devices covered by the Food and Drug Administration. When glasses are exported to the United States or put on shelves on Amazon,eBay, and other platforms, they need to be registered by FDA. Besides the product listing, when the product passes the customs, the company may be asked to produce a Certification Statement of Impact Resistance stating that the product meets 21CFR801.410 Drop Ball Test requirements.
