PROGRESSIVE" OR "BY REFLUX" GLASS
People engaged in a "close" - as a "far away" - bear correction, do best appeal to "double vision glasses" because they see it both far and near.
AL 200 YEARS THERE SEGMENT SPECTACLE, which you ver (= more than 6m) and near (30 cm) can see. The distance between (0.5 m to 2 m - including useful in computer and office work - even in windows to read the prices) fall away.
IN 1959 WAS THE FRENCH ESSILOR GRADUATED GLASS COMPANY ( "the famous Variluxglas") on the market. This glass flowed gradually from close-distance segment to segment, so there is a zone in the glass that can be created for the intermediate distance (Computing / window etc.).
HOWEVER, THERE WERE 2 PROBLEMS:
1) The
READING AREA WAS RELATIVELY SMALL (1 cm) compared with the segment glasses (full width glass could be used, if desired).
2) The gradual overflowing of strength in the middle was necessarily accompanied by
DISTORTION OF THE IMAGE on it.
This annoyed drivers and athletes! Progressive however it succeeded in further broadening the reading area and could also reduce the strain on it. This resulted in 1994 in the Varilux Comfort glass, thought to be the ultimate progressive glass. So, this is still the standard by which all progressive lenses compared
IN 2000 Essilor was yet again a new glass on the market, Varilux Panamic, with major improvements. Since then, the other firms to get glasses on the market, which have similar characteristics:
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An even WIDER FIELD of vision as you right your looks: 15% more than Varilux comfort. This is useful for everyone, but especially for people who do much computer work! The depth perception is thereby improved! You also need to change your attitude to a less optimal view to find!
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The distortion on it is reduced even further, running on very soft and is pushed to the extreme side! The objects, which they arrive, are so "normal" view. A simple eye movement to it, therefore 25% faster viewing area. This time, the identification of objects on it as well, which is important in driving and sports! Even when climbing stairs is a significant advantage!
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A FASTER ADJUSTEMENT because the variations in the glass worked its way. So you get the less annoying shaky-swing and impact of past!
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A GOOD GLOBAL VIEW: the surface of both glasses are better aligned, so that both eyes look the same, in which direction they look: they are on or close to 1 point (= convergence)! Never could work well as both eyes, with progressive glasses!
The chance that you can not tolerate this multifocal, is even smaller than with the older progressive lenses. Essilor and other companies so afraid to give an exchange guarantee: if you or 1 glass for some reason would not be tolerated, you will, within 14 days, no extra charge get another glass: a new progressive glass with a different strength or a segments glass or separate glass for far and near!
STILL MORE DETAILS ABOUT THE MODERN GLASS DOUBLE VISION
1. Ask a
MODERN MATERIAL: organic, polycarbonate or mineral highly diluted (1.8 refraction!). So the glass is always so thin and light as possible!
2. The latest lenses are only
slightly more expensive than the previous glass. Therefore we dare anyone to suggest new glasses! We recommend, though, except when you are more than 50 j! The difference between the lower and upper segment read distance is greater than segment! In the former progressive glasses gave it more and more strain on it wenproblemen!
NEW SINCE 2005:
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more and more are double vision glasses CALCULATED INDIVIDUALLY ACCORDING TO YOUR PATTERN of lateral eye movements (with the head or eyes), new example of Essilor lenses: Varilux Ipseo
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The glasses are now both BACK AND CARVED (previously: only front or rear only), which has led to flatter and thus more attractive glass, which also provide lower distortion, including art glass Hoya (Hoyalux ID (link)) and latest Varilux glasses (Physio) Indeed, this new method allows for adjustments to the front and back of the glass together to interact and to complement