1. One or more non-transitory processor-readable media having embedded code therein for programming a processor to perform a method comprising: detecting a value indicative of ambient light at a time when an image is acquired; storing the value in association with the image; determining a course of action based, at least in part, on the value; determining an on-subject pupil size based, at least in part, on the value; determining a second value indicative of a distance between an image capture apparatus and a subject; storing the second value; determining a critical distance based, at least in part, on the on-subject pupil size and the second value; determining whether to perform corrective action on the image based, at least in part, on the critical distance.