Basis IOL + AddOn IOL = Liberty²

In an ever aging and increasingly active society, more and more cataract patients and presbyopic people (who still have a clear lens) are desirous of independence from spectacles to the greatest extent possible. Liberty², the formula for independence from spectacles after refractive lens exchange, does now allow ophthalmic surgeons to treat their patients in an individual and economically calculable manner with high refractive precision: This dual-lens system offers the highest degree of therapeutic freedom and helps provide Optimal, Natural Vision (ONV) after artificial lens implantation for those concerned.

This is achieved by an intelligent combination of two intraocular lenses (IOLs): In a Liberty² procedure, the surgeon implants a Basis IOL into the capsular bag, plus a trifocal AddOn IOL into the ciliary sulcus. Based on the large variety of possible combinations associated with this system, the highest degree of individual patient care so far can be attained. The two artificial lenses may be implanted simultaneously during one single procedure or by two separate surgical interventions. Liberty² constitutes the latest surgical module for the treatment of presbyopia.

Why two lenses, if one would do?

Both the patients and the ophthalmologists in charge are benefitting from the large variety of combinations when two lenses are used. Ultimately, the dual-lens system offers a broad spectrum of highly individualised refractive power values, achievable with just a few Basis and AddOn lenses. Theoretically, over 3.420 values of total refractive power may be generated with a range of 121 IOLs. Consequently, this allows for both doctors’ offices and clinics to ensure availability of refractive solutions at any time for each and every single patient and to perform procedures with multifocal lenses at short notice. Besides, the costly standby process is no longer an issue.

Coincidentally, the individually most appropriate combination of visual functions needed for Optimal, Natural Vision with high refractive precision is achieved for the patient. Thereby, the visual functions needed may be assigned to two lenses, while the lens powers may be combined in a smart way. The result being:  Good vision at close and far distances, plus in the intermediate range – and all this without spectacles.

The Functional Principle

The functional principle of the dual-lens system can best be explained by way of comparison: The structural composition of the human eye resembles the technical design of a modern high-precision camera. Such an optical device is provided with a photographic objective that bundles and refracts the incoming light. In the human eye, figuratively, the cornea assumes this function. A diaphragm is located behind the photographic objective, regulating the amount of incoming light, just like the pupil aperture of the eye. Ultimately, the bundled and regulated light beams are hitting a light-sensitive area, similar to the retina, where the visual image is formed.

The lenses of the human eye provide image sharpness by focusing on the light-sensitive area, just like a photographic camera does. The higher the number of lenses in the photographic objective or in the human eye, respectively, the better results the focal adjustment comprising both the environment and the distance to the targeted image motif. 

Liberty2 pursues this principle. The second lens, the so-called AddOn IOL, is adding the desirable visual functions needed for sharp vision at short and intermediate distances (the typical PC distance).

Four Crucial Benefits

Individuality: The personal preferences, needs and medical requirements can better be met by applying two lenses. The trifocal AddOn IOL enables the surgeon to offer custom-made combinations for optimised vision at near and intermediate distances. 

High precision: Due to the broad spectrum of refractive power values and the numerous options for corrections spread over four ocular interfaces with a dual-lens system (as compared to just two interfaces), the required lens-power values may be assessed more precisely. This allows for correction of refractive errors with very high precision.

Non-traumatic reversibility: The trifocal part of the dual-lens system is located on the AddOn lens. As this "additive" lens is placed into the ciliary sulcus, a space between iris and Basis IOL, it may be removed at any time in the event of a potential intolerance or any refractive shift. Contrary to a Basis lens in the capsular bag, the sulcus-fixated lens may be exchanged quite non-traumatically, even many years after the original procedure.

Calculability: 1stQ does not just sell artificial lenses, but promotes the Optimal, Natural Vision. That is why Liberty2 has one price – irrespective of the lenses to be combined or of the properties the desired lens combination is supposed to have. When using Liberty2, the costs of lens exchange are transparent and may be assessed quite easily.


Who is the ideal candidate for Liberty²?

Ophthalmic surgeons implant Liberty² during the course of cataract procedures, but also in pre-cataract phases of patients. The dual-lens system is primarily indicated for people who are in their second half of life and whose degree of suffering is permanently increasing because of the age-related changes in the crystalline lens and the associated visual impairment.

Especially in cases where patients feel uncomfortable with spectacles in this situation, the application of Liberty² constitutes a sustainable solution. The permanent manipulation with glasses for reading, distance vision, progressive spectacles and sunglasses, to start with, plus challenges such as combining spectacles with the use of a motorcycle helmet, all of these spectacle-related inconveniences are things of the past, once the dual-lens system has been implanted. People concerned need no longer get annoyed at fogged lenses or slipping eyeglasses during sportive activities. Presbyopia patients feeling impaired by the optical aid device are given a chance to distinctly improve their visual comfort and to cope with their daily routine carefree even.

Moreover, the dual-lens system is particularly suited for people who are unhappy with their visual function despite spectacle correction and who are not willing to accept this situation any longer: Also for these patients, Liberty² will help provide Optimal, Natural Vision leading to a distinctly improved quality of life.

This is what Experts say about Liberty²

In many eye doctors’ offices and clinics Liberty² has become an important therapeutic module for the treatment of presbyopia.

The Liberty² optic with its progressive trifocal array is just great. The options to combine the two lenses are providing a high degree of adaptability to cope with refractive situations. Both handling and safety of the system are convincing.

Prof. Gangolf Sauder, MD, Head of Charlottenklinik für Augenheilkunde, Stuttgart/Germany

I feel comfortable with the offensive approach: a planned 2-step trifocality with Basis IOL in the capsular bag and the AddOn trifocal in the sulcus. The superindication for this technique is RLE or post lasic cataract surgery. Refractive surprises shall be avoided completely.

Kjell Gunnar Gundersen, MD, IFOCUS Eyeclinic Haugesund/Norway

I am convinced of this concept. Liberty² enables me to provide my patients with the best trifocal eye care currently available. It offers the option for lens exchange or retrofit at any time in the event of whatever kind of intolerance or improvements as future technologies emerge. This is its most important benefit in my opinion.

Thomas Kohm, MD, Argus Augenklinik, Karlsruhe/Germany
Once the first enthusiastic Liberty² patients had shown up with excellent results, we felt encouraged to further promote the dual-lens system, even for clear-lens patients. Liberty² enables me to provide quite individual care for my patients in the future. 
Harald Gäckle, MD, Augenlaserzentrum Neu-Ulm/Germany

I have tried it on myself, so I now have Liberty² in both eyes. I am getting along well again without spectacles in all circumstances. This gives me a new kind of life awareness with a feeling of freedom after many years of constraints with varifocal glasses.

Rüdiger Dworschak, Graduate Engineer, Founder and CEO of 1stQ

Liberty² for Download

In the download area, physicians and patients will find comprehensive information material on Liberty². You may download documents such as brochures, data sheets and the latest publications.

Information material

Any questions as to Liberty²? In this case, please contact your sales rep.