Intraocular Lens Power Calculations for Cataract Surgery:

American Society of Cataract and Refractive Surgery Best Paper

The choice of the correct intraocular lens (IOL) is a critical step that completes the elegance and spectacular results offered by modern cataract surgery.  Decades went by when the precise understanding and calculation of such IOL powers eluded the scientific and medical community.  The advent of LASIK made the situation more complex and so called “refractive surprises”multiplied.  Several ad hoc solutions were proposed but they continued to be unreliable.   Dr. Sayegh pioneered a method that established the relationship between the theoretical optics based models and the regression methods used for decades, thus identifying the sources of errors and opening the door to better refractive results for patients undergoing cataract surgery many years following a LASIK procedure. Initial work was performed while Dr. Sayegh was at Washington University in Saint Louis and Barnes Hospital and refinement to the method is ongoing.   Dr. Sayegh received an American Society of Cataract and Refractive Surgery best paper award for this work.