As they grow older, many people notice age-related vision problems that are normal. Even though it may be somewhat frightening to individuals, such vision changes are not usually a sign of a serious problem. However, it can be frustrating when one cannot see well enough to read or drive. Fortunately, trifocal lenses are available for individuals who need three different powers in one lens.
The first bifocals were invented by Benjamin Franklin in the 1780s. Prior to that, those suffering from presbyopia had to use two pairs of glasses. The aforementioned condition is the eye disorder that results of the need for bifocals. The first bifocal models had a line across the width of the lens. The top portion was used for distance vision, while the lower portion was used for reading.
As people reach their fifties, intermediate vision sometimes fails, depending on how the aforementioned presbyopia develops. When bifocals are used, a person can see near and far, but blurry arm's-length vision is often still a problem. A solution for this issue was developed in the nineteen forties. This solution was the trifocal lens.
Trifocals have an additional lens segment above the close-up vision section in the long-distance lens. This results in the glasses having 3 different strengths. They subsequently allow people to see with clarity in 3 different fields.
There are two kinds of contemporary trifocal lens designs. These are executive style and flat top. Ribbon shaped segments are seen with executive style, which feature lines through the width of the lens. Designs referred to as flat top have round sections and are unlined. Many individuals enjoy wearing models without the tell-tale lines.
Modern technology has also made it possible to develop a broad range of trifocal contact lenses. The benefits associated with contacts of this type are the same as the aforementioned glasses. Ultimately, those who have vision problems associated with aging should discuss trifocal lenses with their optometrist.
The first bifocals were invented by Benjamin Franklin in the 1780s. Prior to that, those suffering from presbyopia had to use two pairs of glasses. The aforementioned condition is the eye disorder that results of the need for bifocals. The first bifocal models had a line across the width of the lens. The top portion was used for distance vision, while the lower portion was used for reading.
As people reach their fifties, intermediate vision sometimes fails, depending on how the aforementioned presbyopia develops. When bifocals are used, a person can see near and far, but blurry arm's-length vision is often still a problem. A solution for this issue was developed in the nineteen forties. This solution was the trifocal lens.
Trifocals have an additional lens segment above the close-up vision section in the long-distance lens. This results in the glasses having 3 different strengths. They subsequently allow people to see with clarity in 3 different fields.
There are two kinds of contemporary trifocal lens designs. These are executive style and flat top. Ribbon shaped segments are seen with executive style, which feature lines through the width of the lens. Designs referred to as flat top have round sections and are unlined. Many individuals enjoy wearing models without the tell-tale lines.
Modern technology has also made it possible to develop a broad range of trifocal contact lenses. The benefits associated with contacts of this type are the same as the aforementioned glasses. Ultimately, those who have vision problems associated with aging should discuss trifocal lenses with their optometrist.
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