As time goes on, numerous individuals notice age-related vision issues, which are usually completely normal. Some people become frightened when they notice such changes, but the latter are not typically indicative of a serious problem. When reading or driving become difficult, however, it often leads to frustration. Fortunately, individuals who need several different powers in one pair of glasses can invest in trifocal lenses.
In the 1780s, Benjamin Franklin invented the first bifocals. Before this invention, those who were afflicted with presbyopia, which is essentially being both nearsighted and farsighted, had to own several pairs of glasses, one for each condition. The first bifocals featured a line traveling the width of the lens. The top section was for distance vision, and the bottom for reading.
When an individual reaches his or her fifties, the development of presbyopia sometimes causes the person's intermediate vision to become blurry as well. Bifocals may correct near and far vision, but the person's arm length vision is Still not good. Trifocals were invented to solve this problem in the 1940s.
Trifocals have a second lens segment that is placed over the near vision section in a long-distance lens. This technically gives the glass 3 different powers. For this reason, individuals have clear vision 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.
Advancements in modern technology provide a vast array of multifocal contacts as well. Such devices are beneficial in the sense that they provide the same 3 clarified vision feels as do traditional eyeglasses. Ultimately, any person who has experienced age-related vision problems should make an appointment with a qualified optometrist to discuss using trifocal lenses.
In the 1780s, Benjamin Franklin invented the first bifocals. Before this invention, those who were afflicted with presbyopia, which is essentially being both nearsighted and farsighted, had to own several pairs of glasses, one for each condition. The first bifocals featured a line traveling the width of the lens. The top section was for distance vision, and the bottom for reading.
When an individual reaches his or her fifties, the development of presbyopia sometimes causes the person's intermediate vision to become blurry as well. Bifocals may correct near and far vision, but the person's arm length vision is Still not good. Trifocals were invented to solve this problem in the 1940s.
Trifocals have a second lens segment that is placed over the near vision section in a long-distance lens. This technically gives the glass 3 different powers. For this reason, individuals have clear vision 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.
Advancements in modern technology provide a vast array of multifocal contacts as well. Such devices are beneficial in the sense that they provide the same 3 clarified vision feels as do traditional eyeglasses. Ultimately, any person who has experienced age-related vision problems should make an appointment with a qualified optometrist to discuss using trifocal lenses.
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