What is an Intraocular Lens (IOL)?

When your natural lens is removed during cataract surgery (or refractive lens exchange) it will be replaced by an intraocular lens (IOL). These are medical devices, which are implanted inside the eye in place of the natural lens, and there are several types of IOL to choose from.

What is a Standard IOL?

This is a monofocal lens which gives clear focus at a fixed distance. When the clear focus is set for distance you will need glasses for close work such as reading or working at a computer. When the clear focus is set for near vision, you will need glasses for distance vision while watching TV or driving. So whichever distance you choose to have your monofocal lens set to, you need glasses at the same time.

Which IOL is Suitable for me?

The selection of the right  IOL for you depends on factors such as your lifestyle, hobbies, profession etc as well as the conditions that you have. Some people have eye conditions which mean that it would be unsafe for them to have multifocal IOL.

You will need a full assessment with us to discuss whether you are a suitable candidate and this treatment is suitable for you.

IOL treatment Eye Wales

What are Premium IOLs?

There are several types of  multifocal IOL.

The bifocal lens is designed to provide two distinct areas of clear vision, one for near vision for activities like reading, and the other for distance for activities like driving.

The trifocal lens is designed to provide the benefits of the bifocal lens with the addition of  a third area of clear vision for intermediate distance for activities like using a computer screen.

The Extended Depth of Focus (EDOF) lens allows a seamless transition of vision from distance to near but the vision it provides is not as clear as the bifocal or trifocal lenses.

If you have astigmatism this means that your eye is shaped more like a rugby ball than a football, so light is focused at more than one place in the eye. If you have a moderate to severe astigmatism a toric IOL can be used to correct this.

Multifocal Toric IOL combines features of both multifocal and toric IOLs. If you have moderate to severe astigmatism and would like the benefits of a multifocal IOL, the astigmatism would need to be corrected in order for the multifocal IOL to be effective. These multifocal toric IOLs can provide a solution for both corrections at the same time.

An accommodating IOL can move inside your eye in order to allow focusing at different distances. They are designed to change shape like the eye’s natural lens.

Monovision is an option where corrective surgery is performed on just one eye, or different procedures are performed on each eye.  If you want to be able to see distance and near without glasses, and you do not wish to have a multifocal IOL then you can choose monovision. You can choose to use a standard lens in one eye set for near vision for reading, and a standard lens in the other eye set for distance vision for driving.

Only one eye is used at a time and as a result this does not give binocular vision either for distance or near vision.

The best visual outcome can sometimes be achieved by using a different type of premium IOL in each eye.

If  you have more astigmatism in one eye than the other we may recommend a toric IOL in that eye, and perhaps an accommodating IOL in the other eye which could reduce your need for computer glasses.

We may recommend one brand of multifocal lens for one eye and a different brand for the other in some circumstances because one brand may provide better computer vision and the other may provide sharper vision at a closer distance, for reading and other close-up tasks.

We will always need to evaluate your specific needs carefully during your consultation to help you to choose the best combination of premium IOLs for a successful visual outcome.

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