Life Change With the Development of Varifocal Bifocal

Since the invention of first pair of bifocals, they have solved lots of troubles for people with eye problems. Along with ever-developing of life quality, there are varifocal bifocal now providing better experience of wearing.

Our vision changes over the years; it’s a fact of life. Very few people live their entire lives without needing glasses at some point. It’s also true that our vision may reverse and actually improve as we age, not the norm but still a possibility.

Varifocal Lenses vs. Bifocal Lenses

Varifocal Lenses:

Varifocal lenses (or progressive lenses) are somewhat more complex. In simple terms they provide a variation in the visual plane at different magnifications. Where a pair of glasses with bifocal lenses will have a definite division at the two different magnifications, varifocal lenses gradually change and incorporate several magnified planes. They provide a continuous range of vision that varies depending on the patient’s requirements and normal daily activities. Typically varifocal glasses are transparent to others because they are not separated by any distinct features between the various magnifications. Although they provide several advantages over bifocals, a learning curve and adjustment time is often necessary.

Bifocal Lenses:

Bifocal lenses simply divide the visual plane into two parts. Typically there is a visual range for reading and another for intermediate or longer distance depending on the person’s natural scale of vision. Typically glasses defined as bifocals use the upper portion of the lens for distance and the lower portion below the eye level for reading. Some styles include a horizontal break between magnifications while others use a circular shape embedded in the lens that is less noticeable. Bifocals are fine for people with distinct visual needs but may be limited for those who have trouble focusing at varying distances. At times they may make intermediate objects, neither close nor far, appear blurry. They also can be somewhat distracting because the “lines” are always there even faintly in some styles. Many people adjust to bifocals after wearing them for awhile and learn to ignore the division breaks.

For most of us, though, finding that we need to hold a book farther away or having difficulty reading the menu in a candlelit restaurant is a common occurrence. It may strike suddenly or take years to realize that the blurriness we’re experiencing is not the result of lack of sleep, long hours at the computer or too many late night parties. In any case it becomes a wakeup call that our eyesight is not what it used to be.

There are also many sub-categories of varifocal bifocal which provide multiple choices for people of different age groups and demands. There are even special bifocals and varifocals designed for glasses for computer work and other tasks that take place at the intermediate.

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