A distance measurement (DM) optical sensor that includes (i) a 2D sensing array that includes sensing elements that include DM sensing elements and feedback sensing elements that are statically allocated to act as feedback sensing elements, (ii) output paths that include DM output paths and feedback output paths; and (iii) one or more processing circuits that are configured to: (a) trigger an outputting of DM output signals, trigger an outputting of feedback output signals, and (b) process the feedback output signals to determine a spatial relationship between an actual location of light sensed by at least some of the sensing elements and an expected location of the light.