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Tecnis IOL offers better contrast sensitivity than other IOLs

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NICE, France — A new IOL with a modified prolate anterior surface provides better contrast sensitivity than other IOLs, according to several studies presented here.

"Contrast sensitivity is becoming the gold standard for functional vision," said Mark Packer, MD, during his presentation on Pharmacia’s Tecnis IOL. In a head-to-head comparison with AMO's SI40 IOL, Dr. Packer found the Tecnis gave patients the same contrast sensitivity in low light conditions as the SI40 did in bright light conditions. He presented his study here at the European Society of Cataract and Refractive Surgeons meeting.

Leif Corydon, MD, also found the contrast sensitivity performance of the Tecnis to be superior to other IOLs. In a study, he compared contrast sensitivity with the Tecnis to an older model Pharmacia lens, the 911A.

"I found the new lens to have better contrast sensitivity than the ordinary IOL, and just about any other ordinary one," Dr. Corydon said.

In Dr. Corydon's study, 10 patients were implanted with the 911A IOL in one eye and the Tecnis IOL in the other eye. "Patients were able to use themselves as controls. This helped to really tell which eye allowed more definition with contrasting elements," he said. Dr. Corydon analyzed patients' levels of contrast sensitivity with low contrast charts for far and near vision.

"I found that there was much better contrast in the eye with the Tecnis," he said. Dr. Corydon attributes the improved contrast sensitivity to the negative aberration and aspheric design of the Tecnis IOL.