Also called Varifocal lenses, or progressive glasses, Varifocals has the options of a pair of bi-focal lenses while not the issues related to the line along the middle. Bifocals are employed by people who has problem seeing long-distance, but are also finding it difficult to read print or newspaper. People sometimes realize this grouping of difficulties as they age, because the lens gets looser, thus while they may have experienced severe myopia as a teenager, they currently want to appear more closely at the book or computer screen. Varifocal glasses provide the wearer the opportunity to do both at once and even prevent the thickness of bifocals.
Bifocals got their bad fame in the 70s and 80s, because they were seen as unappealing and awkward . Lens grinders had to mix two different sorts of lens, one enlarging the space, and the other enlarging the near space. This means that they usually resorted to using thick glass, along with a heavy frame to support the two lenses. They could also cause issues with sight due to the line which joined one lens to the other not being completely ground away. Wearing these glasses for a long time could become wearing, and many people selected to leave them off because of the effort needed to wear them. Because bifocals are so unpopular with several wearers, they are being less frequently prescribed by opticians, who will often ask for two pairs of glasses for the shortsightedness and hyper myopia.
Varifocal glasses are an alternative to the bifocal which uses a much thinner lens to attain the same results. Instead of being two different lenses, the glass is slowly ground to the required consistencies, with the top portion of the lens being for long viewing, with the lower part getting used for close reading. Combining the lenses like this means that the lens maker can use a much thinner piece of glass, and then employ a lighter frame to support the glasses. Additionally, there is no fine line down the middle.
People who work in computers, significantly in IT and computer displays, usually find that bifocal lenses are completely inappropriate for their needs . Instead, they choose Varifocal glasses that will be worn for long stretches at a time, and do not require the user to change the frames, move the glasses, or do anything which requires effort or risks eye strain. Without the line down the center, they can clearly see the screen in front of them, a vital part of their job .
Varifocal Glasses: View The World In A New Way