Artis Symbiose IOL performs at all distances
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The Artis Symbiose IOL provides sharp, continuous vision at all distances with fast adaptation, according to one specialist.
“The through-focus continuous phase ensures image sharpness without the gap that we normally see in the defocus curve at intermediate,” Sheraz Daya, MD, said at the virtual European Society of Cataract and Refractive Surgeons meeting. “That’s why patients adapt so fast and so well.”
Artis Symbiose (Cristalens) is a trifocal lens implant with a mix-and-match design. One lens, the Artis Symbiose Mid, is intermediate dominant, and the other, the Artis Symbiose Plus, is near dominant.
“The two complementary profiles, one optimized for near and the other for intermediate vision, provide full-focus vision from 40 cm to 90 cm without compromising distance vision,” Daya said.
Daya started implanting this IOL about 1 year ago, with the Mid in the dominant eye and the Plus in the nondominant eye of 50 patients. Outcomes, he said, were extremely good. Predictability was high, with 94% of the Mid eyes within 1 D of intended correction and 92% within 0.5 D. Eyes implanted with the Plus lens were 98% within 1 D and 91% within 0.5 D. Monocular vision was comparable between the two lenses, with 60% of the eyes achieving 20/20 visual acuity and 90% achieving 20/25 visual acuity. Binocularly, 81% of the patients had 20/20 visual acuity.
“As for near vision at 40 cm, the Plus lens, as expected, did better than the Mid, and binocularly 69% of the patients saw 20/20 or better. But the thing that made me scratch my head was that at 60 cm, contrary to expectation, the Plus did better than the Mid, with 62% achieving 20/20 vs. 57% in the Mid group. And at 80 cm, the Mid and Plus were almost the same, with respectively 81% and 83% achieving 20/20. One advantage of the Mid lens was a slightly better contrast sensitivity,” Daya said.
To determine whether the two lenses complemented each other or whether to use the Mid lens at all, Daya undertook a Plus-Plus study in 20 patients and found that binocular visual acuity was equivalent to that of monocular Plus.
“The Plus lens was performing well at all distances, we were not losing any intermediate vision, and the defocus curves showed a constant focus with no gaps. Our conclusion is that the Mid lens may not be necessary,” Daya said. “The company showed great interest in these findings and is encouraging me to investigate this further.”
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Daya S, et al. Enhancing near and intermediate vision with a new paired trifocal lens implant. Presented at: European Society of Cataract and Refractive Surgeons meeting; Oct. 2-4, 2020 (virtual meeting).
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