1. A method for iris based biometric recognition, comprising the steps of: (a) receiving from an image sensor, an image selected from a set of images sequentially generated by the image sensor; (b) determining whether the received image includes an iris; (c) repeating steps (a) and (b) until the received image includes an iris; (d) responsive to determining that the received image includes an iris, comparing iris information corresponding to such received image with stored iris information corresponding to at least one iris; (e) rendering an identity decision based on an output of the comparison; and (f) responsive to the identity decision at step (e) comprising a non-match identity decision, and subject to non-occurrence of a termination event, repeating at least steps (a) and (d) to (e) in a successive iteration such that: an image compared at step (d) of the successive iteration is: selected from a first set of images that are sequentially generated by the image sensor subsequent to generating the image compared at step (d) of an immediately preceding iteration; and separated from the image compared at step (d) of the immediately preceding iteration by a second set of images, wherein: said second set of images are generated by the image sensor subsequent to generation of the image compared at step (d) of the immediately preceding iteration and prior to generation of the image compared at step (d) of the successive iteration; said second set of images are not subjected to comparison with stored iris information; and number of images within the second set of images is (i) dependent on a predefined criteria, and (ii) independent of image quality assessment that is implemented on one or more images received from the image sensor subsequent to the step (d) image comparison of the immediately preceding iteration.