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Tecnis IOL may improve stereoacuity, study suggests

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NUREMBERG, Germany — The Tecnis IOL, which is designed to improve contrast sensitivity following cataract surgery, also improves the potential for patients to achieve stereoscopic vision, according to a study presented here.

W. Lange, MD, and colleagues evaluated the stereoacuity of 55 patients implanted bilaterally with the Tecnis IOL (Pfizer). He presented the results here at the German Ophthalmic Surgeons meeting.

According to Dr. Lange, many pseudophakic patients with poor contrast sensitivity after implantation with standard spherical IOLs do not achieve stereopsis. The exception to this has been patients implanted with multifocal lenses, he said. The Tecnis lens is designed with a modified prolate anterior surface that has been shown to improve contrast sensitivity, Dr. Lange noted.

In the study, stereopsis was achieved following cataract surgery by 48 of the 55 patients (87.3%) at 1 day postop.

Dr. Lange noted that the other seven patients had comorbidities that prevented them from attaining stereopsis. This included one patient with glaucoma, one with Parkinson disease, two with subnormal binocular vision and three with macular degeneration.