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Trifocal lenses have been around for a very long time and many people consider them to be their favorite and one of the best lenses ever made. This lens was developed in 1827 by John Isaac Hawkins and has remained relevant and in wide use today. It is mostly used by people suffering from advanced presbyopia and it has three regions.
The intermediate version is used for reading addition so patients with a visual prescription of -4 diopters and a +3 reading addition will be prescribed with trifocals of -1 and an intermediate segment of -2.5 diopters. Trifocal lenses are similar to bifocals with the only difference being that they have an additional segment that is above the reading section. If you suffer from presbyopia and you spend a lot of time in front of screens, this lens is ideal for you.
Trifocal lenses are more expensive than many other lenses for several reasons. This is because this vision correction tool has three different vision ranges embedded into a single lens. From the top to the bottom, the lenses correct problems of distance, up close and intermediate vision issues. Another reason why it is costly is because it is the standard lens prescribed to people who start experiencing presbyopia. The fact that it can remedy the condition of such persons by offering them three different vision ranges makes it a highly valuable lens.
The first one is for long-distance vision followed by the second one which is the intermediate one. This lens is for intermediate vision while the third one which occupies the lowest portion is for up-close vision.
Beyond that, they serve a very unique purpose, compared to other lenses. While regular lenses are meant for a single prescription, and bifocals provide two vision fields, trifocals produce three vision fields. They are similar to progressive lenses but produce a far more streamlined vision range and seamless transition from one field to the next.
Also, note that the cost of trifocal lenses varies depending on the customized features and other options like frame quality and coating.
Anybody who is above the age of 40 years and suffering from mild or acute presbyopia may wear trifocal lenses. If you require multiple prescriptions, rather than opt for more than one glasses, you can go for trifocal lenses instead. Another class of people who should wear this type of lens are those who have visual problems but spend a long time in front of a computer. The bright light from the screen can harm their vision and worsen their condition but with trifocals, they will see clearly. Above all, patients who have a pre-existing visual condition and are beginning to experience presbyopia should consider it.
Choosing trifocal lenses should not be done in isolation but only after you consult an expert. With a doctor's prescription, you can then proceed to buy one that will provide you with the visual aid you need.
Trifocal lenses have several benefits and we review some of them below.
While other standard lenses provide one or two vision fields, trifocal lenses offer triple fields in a single lens. Despite its cost, it is actually cheaper than buying different lenses to resolve different issues. It works well for people who are farsighted and nearsighted. Consider it to be a one cap fits all lenses.
Trifocal lenses clear up blurry images. If you can’t see objects at a distance, wearing trifocals will make them bolder and clearer.
It is relatively easy to maintain. No special skill or expensive cleaning solution is required. However, you will need to handle it with care to avoid damage.
Despite its obvious benefits, trifocals are not without their disadvantages. They include the following.
They are not easy to customize compared to other lenses on the market. This makes it difficult for people with special conditions to adjust the lenses to suit their special needs.
It takes time for the eyes to get used to the lenses. Staring into three lenses with different ranges can create confusion. For people with worse cases of presbyopia, this can take a much longer time.
Trifocal lenses offer users triple value for the price of one. Not everyone should opt for this type of glasses but those who require three vision ranges will improve their vision with trifocal lenses.
More about glasses lenses:
Pros and cons of polycarbonate lenses
The advantages and disadvantages of high index lenses
Transition lenses problems you should know
What are advantages and disadvantages of progressive lenses
What are the advantages and disadvantages of bifocal lenses
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