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Latest-generation fluid-filled IOL shows good results in study
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VIENNA — Six-month data from an ongoing study of the latest model of the FluidVision accommodating IOL from PowerVision show achievement of good acuities across the range of distance, intermediate and near vision.
“We are seeing objectively an average 2 D of accommodation,” Louis D. Nichamin, MD, said at the European Society of Cataract and Refractive Surgeons meeting.
This accommodating lens is a shape-changing fluid-driven implant, in which fluid movement from the haptics into the optic results in shape changing and accommodation. The entire lens is hollow and filled with fluid. As the capsular bag compresses and squeezes the lens, fluid moves from the annular haptics into the body of the optic, increasing the curvature radius. When the ciliary body relaxes again, the fluid moves from the optic out into the haptics, flattening the lens.
“It is pretty simple, but technically you can imagine it is quite an achievement. This lens has been under development for quite some time,” Nichamin said.
The latest iteration of this lens concept, which has been referred to as the NextGen 20/20 model, is currently undergoing a multicenter international clinical trial.
“We are reporting the results of 28 eyes from six sites in South Africa. Distance vision is 20/20, intermediate is also very close to 20/20, and most importantly, near VA is from 20/22 to 20/27. And these are all monocular patients. We saw with previous models that there was one line of improvement when patients were corrected binocularly,” he said.
An in-house autorefractor was developed to objectively document accommodation and was able to detect an average of 2 D of accommodation. The best cases were close to 5 D.
“Subjectively, if you talk to these patients, they all seem to do very well without the usual complaints of dysphotopsia they would experience with other technologies,” Nichamin said.
Contrast sensitivity, and therefore quality of vision, is also very good, he said. – by Michela Cimberle
Reference:
Nichamin L. 6 month pilot study with the next generation fluid-filled accommodating intraocular lens. Presented at: European Society of Cataract and Refractive Surgeons meeting; Sept. 22-26, 2018; Vienna.
Disclosure: Nichamin reports he is a consultant for Glaukos, Johnson & Johnson, Novartis and PowerVision.