Exact-power IOLs show high precision for toric refraction

Heidelberg, Germany-A method to measure the exact dioptric power of each IOL after production allows the manufacturer to include real-power labeling of the lens on a container package that lists the standard half-diopter IOL power as well as the exact power of the IOL.

Exact knowledge of the actual IOL power may be important, especially for patients undergoing refractive lens exchange procedures. A hydrophilic acrylic IOL (Easy Care 600, Technomed) with exact labeling of the IOL power seems to provide very good functional results and surpassed the already precise standard IOLs, according to Anne C. Hunold, MD, and Gerd U. Auffarth, MD, PhD.

"There are legal requirements for the production of IOLs that can range up to 1.0 D in a high-power IOL. [This IOL's manufacturer] has developed a method to measure the exact dioptric power of each lens after production and measures them in 0.1-D increments. Real-power labeling of an IOL may enhance the precision of refractive outcome," Dr. Hunold explained.

Topical anesthesia was induced followed by creation of a clear corneal incision, phacoemulsification, and implantation of the IOL.

Most IOLs that were implanted ranged in power between 18 and 24 D.