Iseikonia and accommodation in the fellow eye in monocular IOL implantation

In unilateral implantation of an intraocular lens (IOL), the main goal, for both distant and near vision, is iseikonia. After monocular IOL implantation, when the normal fellow eye accommodates for different distances, the changed magnification will result in aniseikonia. We have derived formulas for calculating the power of an iseikonizing IOL and of corresponding spectacles for both distant and near vision. Using the formulas, we can predict the degree of aniseikonia produced by accommodation in the normal eye. We suggest that accommodation in the fellow eye be avoided by using reading glasses.