Researchers at the University Clinic for Ophthalmology and Optometry in Vienna showed that new and improved multifocal lenses can permanently correct cataracts as well as age-related short- or long-sightedness. The so-called multifocal lenses enable near and far vision without glasses. The research results were recently presented in the American Journal of Ophthalmology and the British Journal of Ophthalmology.
The risk of developing cataracts increases from the age of 50 onwards. Between the ages of 65 and 75, around 90 percent of all people suffer from cataracts – often without knowing it. For some years now, it has been possible to use special lenses in cataract surgery, which enable those affected to see without glasses. A recent study now shows that an improved form of such lenses can also correct presbyopia, which starts as early as 40 years of age.
In addition to impaired short- or far-sightedness, other special lenses can also correct astigmatism. According to the working group, these types of artificial lenses are being used more and more frequently. The latest research results prove that the artificial lenses sit firmly in the eye and are well tolerated.
The lenses are used in the course of a day surgery procedure. At the same time, cataracts, presbyopia and astigmatism can be corrected. “The full effect of these lenses is highly dependent on their stable fit,” explains Christina Leydolt from the study team. Only optimal rotational stability enables the patients to see well and can save them from further surgery.
The right choice of lens
“We have developed a very precise method for measuring and analyzing the stability of toric lenses,” emphasizes Leydolt. This means that the right lens implant can be safely matched to each individual to achieve optimal correction of the visual impairment. “For patients, this means good vision without glasses after cataract surgery and no further corrective surgery,” says the eye expert.
The team’s current research results prove that new multifocal lenses can also correct presbyopia, which begins to occur in many people as early as 40 years of age. A new generation of these special lenses not only improves near and far vision, but also vision at medium distances.
“The range of different multifocal lenses on offer is constantly increasing and is geared to the growing needs of patients,” emphasizes Leydolt. Particular importance is attached to so-called intermediate vision at distances between 50 and 80 centimeters, because this is the average distance between people and the screens of laptops and PCs. This type of vision is currently the subject of another study that Leydolt and his team are working on. (vb)
Life without glasses
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