In addition to diopters and cylinders, a whole host of other parameters flow into the lens calculation during the manufacture of individualized progressive lenses. These include, for example, the design of the various visual zones of a progressive lens tailored to the wearer.
The lower part of a progressive lens contains the vision correction for near vision and reading. Above this is a typically quite narrow zone for vision at medium distances. In the upper part of the lens, distance vision is corrected. The different zones merge into one another in a “gliding” manner – hence the name of the lens.
Of course, the vision zones are not randomly designed: When reading, we typically look down a little and bend our head forward so that our eyes look right through the lower zone of the glasses. It’s just the opposite when looking into the distance: then the eyes tend to look through the upper area of a lens.
Personal viewing habits
Personal visual habits can also be taken into account in the production of eyeglass lenses. These parameters have a strong influence on the subjective wearing experience and thus ensure an even better visual impression. These optical high-tech products are enriched with functions and look like conventional single vision lenses. In the right frame, they look extremely elegant and modern. Their true capabilities are not apparent to these lenses.
The right eyeglass frame
Speaking of the frame: this is largely free to choose with the varifocals. However, a certain minimum size should not be undercut, otherwise the different visual zones become too small. As a result, the eye has to “aim” very precisely through the different areas when looking, which is tiring in the long run. As a result, the good visual comfort made possible by modern manufacturing methods would quickly disappear.
Which frames are particularly suitable for varifocals? For this question, the optician is the right contact.
The most important facts in brief
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Progressive lenses can be manufactured nowadays so individually adapted to personal visual habits that incompatibilities hardly ever occur.
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Potential “candidates” for progressive lenses are all of us: from an age of about 40 to 50 years, the vision and the adaptability of the eye decreases.
