For example, products from online vendors are much cheaper than optical stores. But there are some exceptions if wearers buy them from different retailers. Therefore, the cost of trifocal lenses is much greater than some bifocals and other conventional lenses. This design can help wearers more easily get used to them and reduce the chances of radical vision transition. There are three different vision areas in those lenses, namely, areas for far vision, intermediate vision and nearby vision. Trifocals are more advanced lenses than bifocals in some senses. Those lenses can ensure wearers enjoy great vision clarity and comfort without any aforesaid complications. Later, the birth of varifocal bifocal lenses has satisfied wearers’ demands to some extent. In order to solve those problems caused by bifocals, lots of designers and professionals have spared no efforts to improve them. Another very common symptom is almost all people will spend some time to adapt them, though the time varies a lot. The reason is the optic nerves in wearers’ mind can not react in time with the vision change, and the brain will suffer greatly as a result. And many wearers may suffer from very serious dizziness and headaches occasionally when they change their vision radically. That’s to say, each of them is responsible for vision at different distance. Those lenses are combined by two different cut lenses. All those problems are mainly caused by their unique structures. But many people may hear from others that bifocal lenses problems are really very troublesome. Here is some wanted information about the two lenses for many people, especially those new wearers.īifocals have two different vision areas, each of which is responsible for near vision and far vision respectively. Each of them has their own advantages and disadvantages. Bifocals and trifocals are two of the most important varifocal lenses in people’s daily lives.