Confused about Varifocals?
Are they the same as multifocals, progressives and bifocals?
We're going to demystify all things varifocal.
Varifocals glasses explained simply: the top and the bottom of a lens, you can visually select from a spectrum of focal power between a near and distance corrective powers. Very simply, you choose the correct focal power for the object you wish to see. This is done by scanning up or down through the focal spectrum of the lens to quickly adjust to varying distances of focal point.
In the example below, you would use the lower part of the lens to see the nearby water and use the upper part of the lens to see further towards the rocks.
Varifcoal glasses meaning a lens offers a gradient of focal strengths. Between the top and bottom of the lens, the wearer can use a spectrum of lens strengths within the lens to find the perfect point of focus for the object they wish to see. Varifocal lenses have a larger and variable focal capacity than bifocal lenses and are commonly considered as superior. Bifocal lenses are comparably simpler. With only two corrective segments, the wearer only has two prescriptive lens strengths to see with per lens. These sections create a characteristic split or ‘D’ section on the lens surface which segregates near or far lens viewing.
Depending on your preferred purpose, your choice of varifocal glasses are generally categorised between standard and occupational lenses. Occupational varifocal lenses are best used for focussing on computers and close reading. Otherwise referred to as office lenses, these varifocals primarily aid your near to intermediate screen-work. Secondarily, occupational varifocals also let you see marginally distanced objects such as across the office floor or the clock on the nearby wall. Standard, everyday varifocal lenses have a broader spectrum of focal power. This means that they can help you see objects further away, intermediately and nearby. This, of course, means that they’re a bit of a jack of all trades and can be quite intricate to use.
Varifocals have a bit of a reputation for being difficult to get used to. Many people find them quite different to that of bifocal or single vision lenses. It’s because varifocal lenses graduate between focal powers instead of having singular or segregated corrective strengths. This is why they are also referred to as progressive lenses. The best way to get used to new varifocal glasses this is through self-discipline. Succumbing to wearing your old non-progressisve glasses is very tempting and makes the process of adjusting to your new varifocals more difficult. Another helpful tip is to turn your head to fully face the object or person you want to look at. Just like an owl… For advice on how to get used to varifocals, you can watch these videos on YouTube.
Varifocal glasses indicate that the lenses which have been fitted to that particular frame are varifocal. This type of lens, otherwise referred to as a progressive lens, gives the wearer varibale focal ability. Single vision and bifocal lenses do not have the same degree of variability as varifocal lenses hence their name.
Occupational lenses can be recommended by your local eye-specialist if you require optical correction which will aid you in your place of work. Office based tasks such as reading (near) and screen work (intermediate) can be helped with varifocal lenses orientated for your occupation. Primarily this type of lens is for near and intermediate vision correction but can secondarily aid you to see across an office space.
Progressive lenses, also known as multifocal lenses, are an advanced type of glasses lens to aid conditions such as presbyopia, myopia, hyperopia and astigmatism. In short, progressive lenses are capable of providing multiple prescriptive strengths in a seamless, multi corrective lens. This makes them to be considered as a superior lens type offering the user a smooth spectrum of focal powers.
For more information about progressisve lenses (varifocals), head over to allaboutvision.com . There, trusted specialists and optometrists discuss the superior qualities of multifocal lenses compared to single vision and bifocal lenses. Click here to learn more.