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Contact Lenses ??? Bifocal or Multifocal? PowerPoint Presentation
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Contact Lenses ??? Bifocal or Multifocal? - PowerPoint PPT Presentation


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As a person ages, their eyes naturally start to lose the ability to successfully increase power by the eye, thus the process of accommodation can no longer take place. As contact lenses continue to become the more popular option, there will continue to be improvements in regards to creating and improving additional multifocal solutions.

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Presentation Transcript
slide2

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

slide3

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

Until recently, glasses, were the primary solution that was offered.

However, with recent developments there are now a variety of different solutions provided by contact lenses as well.

Here is a quick look at exactly what this condition is and certain types of contact lenses can provide a solution.

slide4

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

As a person ages, their eyes naturally start to lose the ability to successfully increase power by the eye, thus the process of accommodation can no longer take place.

In most cases, this does not start to happen until a person hits 40 years of age and the first symptom is normally most noticeable as reading becomes more uncomfortable.

slide5

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

A presbyopic eye will still be able to see some objects completely clearly, however some objects will start to blur. Essentially, the eye enters a fixed state of focus.

This means that at certain distances the eye is perfectly suited to create a clear picture (many times the vision will even be 20/20), however at any other distance, the images will bur.

slide6

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

Before contact lenses were used as a solution to this problem, people were forced to rely on either bifocals or traditional reading glasses.

There are a variety of different contact lens options available today.

The two most popular are mono-vision lenses and multi-focal lenses.

slide7

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

Both options have proven to carry specific benefits and drawbacks and without understanding what each of these options actually provide, making a decision can be difficult.

Fortunately, the differences are easy to understand once you realize what they are and the specific contact lenses work. Here is a closer look at the differences between bifocal and multifocal contact lenses.

slide8

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

The most fundamental difference is that bifocal contact lenses have two prescriptions within the same lens.

Multifocal contact lenses carry a range of different powers in each lens, which is similar to a progressive lens that is used in glasses.

slide9

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

It is important to use this differentiation, because some people will use “multifocal” as a catch-all that includes any lens that has more than one power (including bifocals).

Overall there are 2 basic designs for lenses that treat presbyopia: Alternating and Simultaneous.

slide10

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

The alternating vision design forces your pupil to alternate between two different powers by changing your gaze upwards or downwards.

This design is specifically used for bifocal contact lenses, however there have been some trifocal lenses that have tried applying this same strategy.

slide11

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

If you are having problems imagining how this type of lens works, take a moment and picture a traditional pair of bifocal glasses.

Those lenses function the same way that the alternating design bifocal contact lenses do.

The reason that some people feel that this option is the best is because you are in total control of which power you are using.

slide12

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

These types of contacts are normally smaller than traditional soft contact lenses and instead of moving with your eyes, they stay fairly stationary. This allows your eye to easily move from one power to another.

slide13

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

There are two different types of simultaneous designs for presbyopia. The first is the concentric ring design.

The concentric ring design is primarily for bifocal contact lenses.

With this design, there are two rings of different powers that lie within your pupil area. The center can be either near or far vision powered and the decision is normally up to you.

slide14

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

To best imagine this type of design, try to imagine a dartboard. Now imagine that each ring alternates between near and far vision.

slide15

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

The other type of design is the aspheric multifocal design.

These contact lenses work the same way that progressive eyeglass lenses work.

There are a range of different powers that are all spread out and blended across each lens.

slide16

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

While this has proven to be extremely effective, it is important to note that it will take some time for your brain to learn to choose the correct prescription level for any given moment.

slide17

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

Because of the vast array of options that you have to choose from, trying to decide between bifocal and multifocal contact lenses can be a difficult one.

Many people suggest that the best idea is to test out a variety of different options until you find the right fit for your specific needs and comfort.

slide18

In order to create clear near vision, your eye increases its power though a process known as accommodation.

This process is fairly similar to what a camera lens does in order to focus on objects close to the camera lens.

Presbyopia is a condition in which the eye is not able to complete the process of accommodation successfully and is normally a result of aging.

As contact lenses continue to become the more popular option, there will continue to be improvements in regards to creating and improving additional multifocal solutions.