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Add-on IOL technology enhances results of previous cataract surgery procedures
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BERLIN — Preliminary experience with Human Optics' Add-On IOL system suggest that this new method of correcting postoperative pseudophakic ametropia is promising, a surgeon said here.
"We have so far implanted 22 eyes of 16 patients with these lenses," Detlef Holland, MD, said at the European Society of Cataract and Refractive Surgeons meeting. "We had no intraoperative or postoperative complications. The intraocular pressure was in the normal range, all the IOLs were centered, and no iris capture or depigmentation occurred. Good uncorrected near and distance vision and a stable improvement of refraction were achieved."
The procedure consists of the implantation of a second lens above the pre-existing IOL. The lens is a three-piece implant, with a 14-mm overall diameter for stable fitting in the sulcus. The concave 7-mm optic surface prevents contact with the underlying IOL. The implant is available in diffractive, toric and spherical models.
Rotational stability of the toric model still poses some problems, Dr. Holland said. In three cases, the Add-On IOLs needed repositioning, and one IOL was explanted because of multiple rotations.
The technique is intended for eyes in which cataract surgery with posterior chamber IOL implantation was previously performed. Dr. Holland did not recommend performing cataract surgery and simultaneously implanting the two lenses.