1. An apparatus, comprising: a housing configured to be wearable by a user; a first image sensor coupled to the housing, the first image sensor having a first focal length and a first field of view; a second image sensor coupled to the housing, the second image sensor having a second focal length and a second field of view, wherein: the first field of view and the second field of view in a region approximate the user; the first field of view and the second field of view are substantially similar; the second focal length is greater in length than the first focal length; the first image sensor is configured to capture a first image; and the second image sensor is configured to capture a second image; and a processor operably coupled to the first image sensor and the second image sensor, wherein the processor is configured to: receive the first image from the first image sensor; receive the second image from the second image sensor; define a set of elements comprising a first element of the first image and a second element of said second image, wherein the first element substantially corresponds to the second element; determine a first rate of change of an image property of the first element, wherein the first rate of change is indicative of a first focus level of the first element; determine a second rate of change of the image property of the second element, the second rate of change is indicative of a second focus level of the second element; and assign the set of elements to at least one category in view of a relative difference between the first rate of change and the second rate of change.