The gradual reduction or blending of the diffractive step heights. The application of apodization to intraocular lenses is a patented process by Alcon and can only be found in the AcrySof® ReSTOR® IOL.

lens treatment designed to cut down diffraction fringes that appear around the images bright points of light.

transformation of an image which by fitting a sine wave across the image border such that abrupt transitions will become continuous, will free the final image of spikes at the peripheries

Apodization literally means "removing the foot". To apodize is the technical term for changing the shape of a mathematical function, an electrical signal, an optical transmission or a mechanical structure to remove or smooth a discontinuity at the edges. An example of apodization is the use of the Hann window in the Fast Fourier transform analyzer to smooth the discontinuities at the beginning and end of the sampled time record.