What are keyhole glasses used for?
The keyhole distributes the weight of the glasses to one side of the nose rather than the top. It's a good choice for those with broad noses. Due to the lack of support at the top, the keyhole design will result in the frame being positioned lower than the saddle bridge frame. If you find that your saddle frame causes your eyes to be located just below the center of the lens area, you may try a wider frame or opt for a keyhole design.
Costs are lower for online stores.
The most fundamental reason is cost. The cost is not just the cost of the glasses, and there are many other aspects of the cost. If it is an online store, it only needs a warehouse, a computer, a customer service, which can meet the needs. And if it has the factory direct sales, then the product purchase cost is lower. The online shop needs publicity fees. For a physical store, the superior location, high rent, water, electricity, and labor costs, a variety of optometry processing instruments are valuable. There is a lot of brand publicity, decoration costs. These aspects are the cost of physical stores to pay.
Optometry for prescription glasses
The key prerequisite for proper glasses is accurate optometry. In foreign countries, professional optometrists are generally required to be qualified to issue prescriptions for optometry. However, this is not very standardized in China. Many optometrists have only been trained for a short period of time and do not have the basic knowledge of ophthalmology. For some complex situations, they may not give a proper prescription for glasses. Therefore, optometry should choose a qualified institution. If you are adolescents, people with high myopia, people with anisometropia, etc., you may need to dilate your pupils for optometry. It is best to go to the optometry center of the hospital for optometry.
The Silhouette is a luxury eyewear company founded in 1964 in Austria. The target is to provide glasses with unmatched performance and inner strength. It is a leader in glasses innovation, providing a simple and stylish range of selections for both men and women. With each pair of glasses, they try to give everyone a pair of glasses that allow them to be who they really are.
Convenience and timeliness.
The essential carrier of Mobile applications is the mobile terminals. As the name suggests, these mobile terminals are not only smartphones and tablets but smart glasses, watches, clothing, accessories, and other kinds of personal belongings. They are part of what the human body wears and can be used anytime, anywhere. People can make full use of the fragmented time in life and work to accept and process all kinds of information on the Internet. They can no longer worry that they will miss any vital information, time-lapse information.
Production technology of progressive lenses
In addition to the evolution in design, the production technology of progressive lenses is also constantly improving: the most representative one is the free-form technology. The emergence of free-form surface technology makes the production more flexible and rapid and can realize a more personalized design. For now, progressive lens design is done on the inside surface of the lens by a computer-controlled lathe, as if a master engraver could carve a piece of stone into a work of art.
Why are blue light glasses yellow?
The material of the lens makes it turn yellow. If it's just blue and the lens is yellow, that's the material itself. Blue light glasses can weaken blue light entering human eyes. Blue light is mainly produced by mobile phones and computers in life. The blue light on the electronic screen is unchanged, so a film can only be designed on the lens to absorb blue light. This can effectively reduce blue light. The complementary color of blue light is yellow, so the yellowing of the anti-blue lens is normal. The material of an anti-blue light lens can effectively shield the blue light. If the blue light is removed from the white light we usually see, it will show yellow, which is a normal phenomenon.