Intraocular lens power check.

We have developed a simple procedure that uses a standard keratometer to determine the power of an intraocular lens that is still in its sterile package. The procedure is accurate to within +/-0.5 diopter and may be used in conjunction with any intraocular lens packaging system in which the convex side of a plano-convex intraocular lens is clearly visible through a clear, flat surface.