How to buy contact lenses online?
Choose a standard retailer. Contact lenses belong to three types of medical device products, and the sale of contact lenses and their care solution belongs to medical behavior. No matter it is an optical shop or contact lens e-commerce website, it must have a Medical Device Trading Permit before it can be sold. The trend of buying contact lenses online is obvious, and there are a lot of websites of individuals and contact lenses that do not have business licenses. Therefore when the user buys a contact lens on the net, be sure to look for management qualification of Medical Device Trading Permit, guard against being cheated.
Blue light blocking glasses lenses and common glasses lenses have different colors.
The real blue-light-blocking glasses should be yellow. Based on the primary principles of optics, the light reflected from the lens is the light that resists the same color as it. As the name indicates, blue light is to prevent the reflection of blue light. Remove blue light, and all the red, yellow, blue, and green in visible light is yellow.
Persol
Founded by Giuseppe Ratti in 1917, Persol is a brand of glasses designed for pilots and race car drivers and is now known for its durable sports sunglasses. Persol is an Italian luxury eyewear brand specializing in the production of sunglasses and frames. It is one of the oldest eyewear companies in the world, originally catering to pilots and sports riders. Currently, the company sells durable sports sunglasses. Currently, all Persol plastic glasses are made in Italy using cellulose acetate. Persol has had an apparent influence in the sunglasses industry. It was Persol who pioneered the development of elastic frames.
American Eyewear
With a wealth of experience, American Eyewear provides wonderful service to its customers.They provide dozens of frames from the world for you to choose from. An optician trained with years of experience can help you choose the right glasses for your face. They make sure your eyes, Bridges, and temples fit perfectly. They provide frames made from hypoallergenic SPX plastic, stainless steel, and ultralight titanium. Rimless glasses are provided. They have their own full eyewear lab facilities to ensure your prescriptions are accurate and prompt. It stores a large number of lenses like single vision, multi-focal lenses, etc.
How to Choose Glasses for Heart Shaped Face?
Wearing a great pair of glasses can make you look more beautiful and fashionable. You want to find a pair of eyewear to correct your vision. Of course, they should be comfortable to wear.
Everyone has their unique style. So, finding a pair of great sunglasses is not an easy job. So, in this post, we will show you some suggestions to glasses for heart shaped faces.
Before proceeding with how to choose glasses for heart shaped face, you need to know whether you have a shaped face. Heart shaped face has some obvious features, such as a broad forehead; high, prominent cheekbones; a narrow jawline; and an angular chin. So, you can check whether you have these features.
However, if you do not know what face shape you have, you can click here to take a reference and have a check.
After checking the face shape you have, we will show you some glasses for heart shaped face.
The material of spectacle lens
It is not only based on the refractive index to select but also depends on the material of the spectacle lens. Then there are several types of materials for myopia glasses. For example, there are glass, resin, and better PC lenses. There are also obvious differences between the three materials. The use rate of glass lenses is not high now. The myopia lenses that you often see are mainly resin lenses. These resin lenses are more suitable for wearing. Also, you can choose PC lenses. There are many PC lenses on the market. This kind of lens is very light, high toughness, and not easy to break, so it is also very popular with everyone. These three materials have their own advantages and disadvantages, so decide which one to buy according to your needs.
Aspheric lenses are different from spherical lenses.
Spherical lenses: The higher the strength of spherical lenses, the worse the visual experience, because the spherical lenses do not eliminate aberrations. Aspheric lens: it can greatly reduce the deformation of things and make people see more clearly and vividly. Besides, the eyes are not easy to get tired and the appearance is beautiful. It reduces the aberration of the lens and ensures a clearer field of vision.
When the parameters of the lens are normal, the optical center of the myopic lens is the clearest, and the peripheral part of the lens will be slightly deformed. So now the lens is designed with an aspheric surface. Under normal circumstances, the mainstream aspheric lens in the market has a reduced edge design, which is about 5 to degrees lower. The opposite edge of a spherical lens is higher.
