A multifocal capable ophthalmic aberrometer has an afocal relay defining an optical axis, an object plane, and an image plane. The image plane is conjugated to the object plane. A probe beam is projected along the optical axis and is propagated toward the object plane. Reflection of the probe beam from a subject eye located at the object plane generates a wavefront emerging from the object plane. A Hartmann-Shack sensor positioned at the image plane and produces an image of Hartmann-Shack spots of the wavefront. A control electronics acquires the images of the Hartmann-Shack spots in a single measurement. A processing electronics calculates an optical power map of the subject eye with respect to a center of the wavefront and averages the optical power map over the images.