Varifocal Glasses: View The World In A New Way Also called Varifocal lenses, or progressive glasses, Varifocals have the features of a pair of bi-focal lenses while not the problems associated with the line along the middle. Bifocals are utilized by people who has trouble seeing long-distance, however are finding it hard to read print or newspaper. People sometimes face this combination of difficulties as they age, since the lens gets looser, thus whereas they will have experienced severe myopia as a teenager, they currently need to appear more closely at the book or computer screen. Varifocal glasses give the wearer the chance to do both at once and even avoid the thickness of bifocals. Bifocals got their bad fame in 70s and 80s, because they were seen as unattractive and uncomfortable. Lens grinders had to mix two different sorts of lens, one enlarging the space, and the other enlarging the near space. This suggests that they often resorted to using thick glass, along with a heavy frame to support the two lenses. They could also cause issues with sight because of the line that 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 required to wear them. Because bifocals are so unpopular with many wearers, these are being less often prescribed by opticians, who will often ask for two pairs of glasses for the myopia and hyper myopia.
Varifocal glasses are an alternative to the bifocal that makes use of a much thinner lens to achieve the same results. Rather than being two different lenses, the glass is gradually ground to the required consistencies, with the top portion of the lens being for long viewing, with the lower part being used for close reading. Combining the lenses like this suggests that the lens maker will use a much thinner piece of glass, and then use a lighter frame to support the glasses. In addition , there is no fine line down the middle.
People who work in computers, particularly in IT and computer displays, often find that bifocal lenses are totally inappropriate for their needs . Instead, they choose Varifocal glasses that can be worn for long stretches at a time, and do not need 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 could clearly see the screen in front of them, a vital part of their work.