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Complementary IOLs may offer new solution for presbyopia
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PARIS — Preliminary results with the Artis Symbiose IOL for presbyopia look promising, according to several speakers at the Cristalens International Symposium held during the European Society of Cataract and Refractive Surgeons meeting. This new concept IOL technology consists of two complementary profiles, one optimized for near and the other for intermediate vision.
“The combination of Artis Symbiose Mid for intermediate and Artis Symbiose Plus for near, each implanted in one eye, provides full focus vision with phase continuity, ensuring image sharpness from 40 cm to 90 cm without compromising distance vision,” Fannie Castignoles, PhD, optics R&D at Cristalens, said.
Implanting two complementary optic profiles does not mean stepping back to the old concept of mix and match, in which two lenses with different optics are implanted.
“I never liked that concept, but this is something completely different. It is not mix and match because we are implanting two twin optics with complementary diffractive profiles,” Oliver Findl, MD, said.
So far, he is satisfied with the results of patients treated in Vienna, Austria, particularly for intermediate and distance, and is looking forward to verifying them further in more patients.
In another series of eyes treated by Jeronimo Lajara, MD, PhD, in Murcia, Spain, monocular defocus curves showed very good visual acuity at distance and near with the Plus lens and at distance and intermediate with the Mid lens.
“Is the human brain able to tolerate the difference in performance between these eyes? The answer is in the binocular defocus curve, which demonstrates an outstanding VA in photopic conditions. What is even more impressive is the continuous binocular depth of field from 0 D to at least –3 D of defocus, which translates in vision from infinite to approximately 30 cm without glasses,” Juan F. Zapata Díaz, PhD, an optometrist working with Lajara, said.
Uncorrected visual acuity results for the three distances were somewhat affected by refractive surprises and halo in some patients at 1 to 3 months, which might improve with adaptation by approximately 6 months. Contrast sensitivity was within the normal values for this age range.
“Patient satisfaction was very high, scoring 88 of 100, and 100% of patients are spectacle-free,” he said. – by Michela Cimberle
Disclosures: Castignoles reports she is an employee of Cristalens. Findl, Lajara and Zapata Díaz report no relevant financial disclosures.