[Practical aspects of the evaluation of preoperative aniseikonia].

Ten years ago, Dr. Simone Delthil, who was one of the first, in France, to make researches into aniseikonia, departed from this life. This anniversary offers the opportunity to the authors to recall that it is most desirable, before operating, that theoretical modifications of the size of retinian pictures should be considered, according to the selected compensatory method, especially in the case of anisometropia or unilateral aphakia.