How do bifocal reading glasses work?
Bifocal reading glasses have two different lenses on the same lens. The top of the lens is your normal distance prescription, while the bottom is for close-up viewings, like reading. The two lenses allow you to alternate between them by moving your eyes up and down as needed. A bifocal lens is a type of lens that has two different areas of vision: one for close range and one for long-range. Typically, the upper section covers remote vision and the lower section covers reading. With a traditional bifocal lens, you can see the difference between the two lenses because the lower curve is a little different.
Points to Note When Buying Saddle Bridge Glasses
Ask yourself the following questions: Is it worth buying saddle bridge glasses? What are the benefits of buying saddle bridge glasses? Which saddle bridge glasses are better on the market at present? Where can you find information about saddle bridge frames? It includes buying guides, rating sites, word-of-mouth recommendations, online forums, and product reviews for saddle bridge frames. These studies are important to ensure that you get the best saddle-bridge frames possible. Make sure you only use trustworthy websites and sources.
Polycarbonate vs Trivex Lens: Which One Is Better?
We have introduced what the polycarbonate lens and Trivex lens are. What are the differences between the polycarbonate lens and the Trivex lens? So, in this section, we will show you the differences between these two lens materials.
- Thickness:Polycarbonate glasses are about 10% thinner than Trivex lenses.
- Weight:Polycarbonate glasses are around 10% heavier than the Trivex lens.
- Optics - central:Trivex lenses have less internal stress and may produce sharper central vision than polycarbonate lenses.
- Optics - peripheral:Trivex lenses have a higher Abbe value so they can produce sharper peripheral vision with less chromatic aberration than polycarbonate lenses.
- Impact resistance:Polycarbonate and Trivex lenses have comparable impact resistance.
- UV protection:Both polycarbonate and Trivex lenses can block 100 percent of the sun’s harmful UV rays and provide protection for your eyes.
- Availability:Polycarbonate lenses have a wider variety of lens designs than Trivex lenses.
- Cost:Trivex lenses are expensive than polycarbonate lenses.
As for Trivex vs polycarbonate, you may have known some information from the above part. You can choose either lens material based on your like when purchasing the glasses.
What Are Single Vision Lenses?
What are single vision lenses? You may have the same question. Single vision lenses have only one prescription for a given distance. Most reading glasses and distance glasses have single vision lenses because they are designed for people who are difficult in seeing either near or far. Some people are using their single vision glasses for both far and near depending on their types of prescription.
You can choose to wear single vision reading glasses to correct your eyesight if you have trouble reading text on your phone or computer screens. You can also wear single vision glasses to help you make out traffic signs while driving.
Single vision lenses for farsightedness are thicker at the center than those for nearsightedness, which are thicker at the edges. And the single vision lenses generally range between 3-4mm in thickness. The thickness varies depending on the size of the frame and lens material chosen.
After learning some information about one lens glasses, do you know the benefits of them? So, in the following part, we will show you the advantages of single vision lenses.
Why My New Glasses Give Me a Headache?
The new glasses make me dizzy or headaches. You may have these symptoms when getting a new pair of glasses. Why do the new glasses give me a headache? When getting used to the new glasses, your eyes and brain have to work harder to see clearly through your new lenses. The more your strain to see, the more likely you are to get a headache.
So, how long to adjust the new glasses? It may take a few days. If you still feel uncomfortable after wearing the new glasses for a few weeks, you should ask for the eye doctor or the optician to check whether your glasses are made correctly and check whether your prescription is correct.
In addition, if you want to get a new pair of glasses, you can try Koalaeye Optil, which is an online optical store and helps you to prescribe your eyeglasses with great convenience. Koalaeye Optical provides various glasses, including progressive glasses, blue light blocking glasses, sunglasses, driving glasses, and different shape frames.
Where to Buy Blue Light Glasses?
From the above part, you have learned the advantages of blue light glasses. Hence, you may ask where I can get a pair of blue light glasses. Thus, Koalaeye Optical would be a good choice since it provides various blue light blocking glasses with beautiful and fashionable frames. Besides the blue light glasses, Koalaeye Optical also provides other eyeglasses and sunglasses. You can choose the satisfied one from here.
Sports goggles
With the improvement of people's sports concept and sports protection concept, sports goggles are also widely welcomed. Safety glasses are worn during sports must have four major functions, safety (PC lenses), protection (TR-90 frame, soft and flexible), comfortable (non-slip nose pads and foot covers), and beauty (match sports and leisure clothing).
Sports goggles with shatter-resistant plastic lenses and side shields can prevent balls or sand from hitting the eyes. It can be fixed on the head without worrying about falling off during intense movements. The unique design of the rim of the frame makes the glasses very close to the human face and has a proper external isolation effect so that the human eye is not easy to be attacked by bacteria. The special lens has the functions of anti-fog, anti-shock, and ultraviolet rays, which is very suitable for outdoor activities.
