What Is Bifocal Lens?
Changes in vision seem to be related to age. Presbyopia, a common eye condition that occurs in middle age, causes changes in your eye’s ability to focus. But this condition can be corrected by wearing 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).
The bifocal glasses were invented by Benjamin Franklin, who solved his own vision problem by taking the lens from his reading glasses and distance glasses and cutting them in half. Then remade the cut lenses into a single pair of bifocals and put the distance lens on top and the reading lens on the bottom.
Rimless Reading Glasses Lightweight Readers For Women And Men [2.50]
The frames are made of high-quality materials. They use rimless and carefully designed rectangular lenses. FIORE provides the ultimate style, clarity, and comfort. Suitable for both men and women, it is characterized by lightweight and high comfort. A flexible arm and adjustable nose pad ensure comfort. It comes with a matching hard plastic case and buckle, a set of 3-in-1 hex nuts, and a screwdriver. It is the perfect gift for parents and the elderly. The best choice for Valentine's Day, Christmas, Mother's Day, Father's Day.
How to Get Used to Progressive Lenses?
It is common that your vision may change when you are over age 40. You can find it is happening when have to hold your favorite book, the daily newspaper, or a restaurant menu farther away just to read it. This is an eye condition called presbyopia. It is normal and almost all of us get it as we reach middle age.
This eye condition often can be corrected by progressive lenses which allow you to see objects from far to near clearly. With progressive lenses, you do not have to switch your glasses to see far or near objects frequently.
However, since progressive glasses have three different prescriptions in one lens, it may be difficult for some people to adapt to the new ones. So, in this post, we will show you how to get used to progressive lenses.
GlassesUSA has a wide variety of glasses.
GlassesUSA has a large selection of frames to choose from. Their frames are classified by gender, designer, color, shape, and trend. In addition to sunglasses and sports glasses, there is an area for children's glasses. GlassesUSA has cheap options and expensive frames. To mark the launch of 3D-printed glasses, GlassesUSA is giving consumers the opportunity to design their own frames for an opportunity to win a $300 GlassesUSA gift card.
The Pros of Rimless Glasses
First, rimless glasses are light weight. Compared with other glasses frames, they are much more lightweight and greatly ease the pressure on the bridge of nose and eyes. So, it is suitable for those people who have strong prescriptions. As we know, the stronger prescription is, the heavier glasses are. So, no frame glasses would be a good choice.
Second, rimless glasses are fashionable. They make you look elegant and sophisticated.
Third, when you wear rimless glasses, there will be no restrictions or limits when it comes to the size of your lenses or the shape of your lenses. You may be surprised at all the options you will have when you make the decision to wear rimless glasses.
Meanwhile, besides the advantages of rimless glasses, there are some negative voices of frameless glasses.
How to buy anti-blue light products?
In order to further standardize anti-blue light products and make all kinds of products effectively protect eye health, relevant standards have been formulated. Based on the different effects of blue light in different bands on the human body, the transmittance of blue light in each band is required in the standards.
For example, in the band range of 415-445 nm, the transmission ratio of light is less than or equal to 80%, and more than 445 nm, it is greater than 80%.
The frame materials
You should choose the driver's glasses with alloy materials. The glasses made of this material are light and strong, so your ears won't be uncomfortable when you wear them for a long time.