Brick-and-mortar stores have fewer customers.
Brick-and-mortar stores are known to have a significantly smaller customer base, targeting a particular county or even a particular region and population. Mainly aimed at young students.For physical stores, their income range is relatively narrow. Therefore, in order to make more money, every physical store can only make a profit by raising the single sale price. Online stores attract consumer demand from all over the country and the world through the Internet.
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.
The Disadvantages of Glasses Without Prescription
In this section, we will list some of the disadvantages of glasses without prescription. Even if you are a good candidate for non-prescription glasses, professional advice is recommended. It is not recommended to buy higher values without medical advice. If you need a different correction for each eye or have astigmatism, prescription lenses are more suitable.
Are night driving glasses good?
The color of night driving glasses can be selected from yellow to amber. Yellow lenses will reduce the light entering the eyes and reduce visibility. At night, this can be harmful. The lens filters out a lot of glare, but also filters out other visible light, making it difficult to see objects in dim or dark conditions.
Some people who wear night driving glasses say that they are more capable of seeing things at night. However, related test studies have shown that driving glasses at night does not improve night vision, nor can it help drivers see pedestrians faster than when they are not wearing glasses. A small study in 2019 showed that night driving glasses actually slow down the visual reflex by a fraction of a second, making night vision worse. So don't try to improve the safety of driving at night by wearing driving glasses with this kind of yellow lenses.
Does wearing sunglasses at night help driving? Like night driving glasses, sunglasses will reduce the amount of light entering the eyes, which makes them unsuitable for night driving and potentially dangerous.
LEOTONY
It is an online glasses supplier. They have eyeglasses, RX sunglasses, and sunglasses. LEOTONY was founded in 2016 in Seattle, Washington, by a group of passionate, intelligent, and professional young people who wanted to make the most suitable glasses for fashion, white-collar workers, and students. The company's philosophy is to provide the healthiest and most stylish care for the eyes.
Cellulose Acetate
Acetate is a kind of thermoplastic resin obtained by esterifying acetic acid to acetic anhydride under the action of a catalyst. Acetate is resistant to water, gasoline, mineral oil, and lipids, weak alkaline solutions, and acids, excellent weather resistance, not resistant to ethanol, strong acids, and strong alkaline solutions. During thermoforming, it is very necessary to dry the material before forming. Acetate was born in the early 20th century, and was successfully trial-produced and industrialized by the UK in the early 1920s. At present, it is the second-largest variety in cellulose fiber after viscose fiber. Acetate can be used to make textiles, cigarette filters, film bases, and plastic products.
About Costco
Costco is a members-only warehouse club dedicated to providing its members with brand-name goods at the best prices. Costco has hundreds of stores around the world, providing a wide selection of merchandise. And the convenient specialty departments and exclusive member services, all are designed to make your shopping experience enjoyable.
