What is the bifocal lens?
Bifocal reading glasses are characterized by distance vision correction in the upper part of the lens and near vision correction at the bottom. If you need help with both, that's great. This lens is designed to facilitate the working of reading glasses and standard prescription glasses, all in one frame. Glasses are recommended when you are diagnosed with presbyopia, and bifocals are usually the first choice. But for intermediate vision, bifocals are difficult because they're not close enough for the reading part of the lens, and they're not far enough away for the distance part of the lens. Bifocal sunglasses have no magnification at the top, and the reading ability is at the bottom of the lens. Bifocal reading glasses can be found anywhere reading glasses are sold, but they can be harder to find than full magnifying lenses.
The Acetate Spectacle Frame
The sheet spectacle frame is made of a high-tech plastic memory sheet. The current sheet material is mostly acetate fiber, and a few high-end frames are propionate fiber. The acetate fiberboard is divided into injection molding type and pressing and polishing type. The injection molding type is made by pouring in a mold. The plate frame is also suitable for people with a high number of heights because the frame is larger and can withstand a high number of lenses.
The lenses of Walmart Glasses
When Walmart first entered the eyewear business in 1991, Walmart was known for its affordable lenses, which were similar to other big stores and eyewear chains. Then, in 2000, Walmart began offering high-end Carl Zeiss lenses. Customers have noticed the change and they continue to strive to become a leader in eyewear quality. Walmart has led the way in applying anti-reflection and anti-scratch coatings to its lenses. From the beginning, Walmart took steps to provide the best products on the market, with quality levels that exceeded industry standards. The upgrades now underway will continue to deliver on that promise.
Benefits of Progressive Lenses
The lens looks like a single vision lens, with no dividing line between degrees. Not only is it beautiful in appearance, but more importantly, it protects the privacy of the wearer's age (for the wearer of reading glasses). There is no need to worry about showing the secret of the wearer's age by wearing the glasses. Because the degree is gradual, the replacement of the adjustment effect is increased step by step according to the shortening of the close distance. There is no adjustment fluctuation, which is not easy to cause visual fatigue. Clear vision can be achieved at all distances in the visual scope.
Choose a good merchant.
The best option is to return the goods with a quality guarantee.High-quality pure titanium frame production cost is not less than 100 yuan, and online sales will be not less than 50%, so you have to be careful with prices less than 200 yuan. Because pure titanium frame material cost determines its price, the ultra-low price of pure titanium frame is definitely not real.
The origins of Proof Eyewear date back to 1954. The company went global from garage to sustainable eyewear in just a few years. They provide products handmade from sustainable materials, including sustainably sourced wood, biodegradable cotton-based acetate, and recycled aluminum. The acetic acid Rx series features an environmentally friendly frame and hand-layered cotton-based acetate fiber. It is a completely renewable, biodegradable, hypoallergenic alternative to petroleum-based plastics. Some styles come with sustainable wood or metal detailing, and most come with clear or blue-light lenses. Wood harvesting is one of the best sustainable sources of handmade wood. The hand-layered structure creates durability with a unique environmentally friendly design. All frames come with stainless steel spring hinges and a hand-polished waterproof/perspiration resistant natural plant-based sealant.
Progressive lenses and single vision lenses
Single vision lenses are the most widely used optical lenses and are suitable for the general population.
Progressive lenses are suitable for below people.
① Myopia control lenses for teenagers. Progressive lenses are used to relieve visual fatigue and control the development speed of myopia.
② Anti-fatigue lenses for adults. Progressive lenses are used for teachers, doctors, people who use too much computer at close range to reduce visual fatigue caused by work.
③ Progressive lenses for Middle-aged and elderly people. A pair of glasses for middle-aged and elderly people to easily see near and far.