What is Clarivu - Find out more about multifocal vision correction?

Clarivu is the trade name that the health care provider Optegra has uses for a common surgical procedure involving the implantation of multifocal lenses at the time of cataract surgery or clear lens extraction/refractive lens exchange.

The natural lens in the human eye changes as we age. The first of these changes is a stiffening of the lens that occurs as you enter your 40s. As this progresses people typically find that reading small print or seeing things close up becomes more and more of a challenge. This is called presbyopia, and is why most people begin to wear reading glasses in their 40s. When you are younger the lens can rapidly change shape to accommodate for near or distance vision. The stiffer lens of a 40 year old can't do this and is focused only for distance vision. As people enter their 50s and beyond the natural lens becomes less and less clear forming what is commonly called a cataract. Patients will usually notice either generally blurry, fuzzy or hazy vision, or may simply experience more glare and haloes when driving at night. Colours may also seem less vibrant than usual, although this can be difficult to notice until you've actually had cataract surgery when you suddenly realise how vivid colours suddenly are! The Clarivu procedure/mutlifocal lens implantation addresses both age related cataracts (cataract surgery) and age related stiffening of the lens (clear lens extraction/refractive lens extraction), and is a procedure that Mr Angunawela commonly performs at Moorfields Eye Hospital.


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Clarivu involves the implantation of a multifocal lens to replace the natural lens. Multifocal lenses are designed to allow the patients to achieve good distance and near vision without the need for glasses. There are a number of different multifocal lenses on the market including the Restor, Trifocal and the Lentis Mplus-X. All have a common purpose of giving the patients as much independence from glasses as possible. In reality, patients find that they are free from glasses for 90% of the time, and some patients may need glasses when driving at night or if attempting to read in dim light. Whilst the vast majority of patients are very happy with multifocal lenses, some patients simply take longer to adjust to them and a small percentage (0.5%) need to have the lenses exchanged for monofocal lenses due to failure to adapt. Some patients can also experience glare and haloes, although these symptoms are generally mild in the majority of cases. A small percentage of patients (1%) may also need laser treatment to refine the outcome from their lens surgery particularly if there is uncorrected astigmatism, which can contribute to glare. 

Multifocal lens surgery is based on the tried and tested techniques of cataract surgery and like any surgery has small risks. Your surgeonshould discuss all these issues with you.

Mr Angunawela performs cataract surgery and clear lens extraction surgery with implantation of multifocal lenses at Moorfields Eye Hospital. His lens of choice is the Lentis MPlus-X, which has either a +1.5 or +3.0 dioptre reading addition depending on the patient's lifestyle, occupation, leisure activities and visual needs. You can read more about Mplus multifocal lenses by clicking this link.

For further information, or to book a consultation with Mr Angunawela, please contact us by filling the online form or by calling today.

Posted on November 17, 2013 .