Abstract: Certain embodiments provide an intraocular lens (IOL) including a lens body having an anterior surface and a posterior surface, and a diffractive structure having a plurality of echelettes formed on at least one of the anterior surface or the posterior surface. A surface profile of the diffractive structure includes a base surface profile configured to diffract an incident light in one or more diffraction orders, and an achromatizing surface profile including increased step heights in the plurality of echelettes in relation to the base surface profile, and phase offsets between adjacent echelettes of the plurality of echelettes.

Abstract: A system for generating a beam for retinal reflection detection includes a beam processor positioned to receive an illumination beam having a first spot size from a light source. The beam processor can alter the illumination beam to form a beam having a second spot size. Focusing optics focus this altered beam onto an eye, causing a spot to be formed on the retina. A detector receives reflected radiation from the retina passed through the pupil, and generates data indicative of a spatial extent of the eye pupil and an intensity map of the reflected radiation. A software package can determine from the data a pupil size and an intensity level in the intensity map. A controller in communication with the software signals the beam processor to vary the second spot size to optimize an accuracy of the determined pupil size and the intensity level.