A system for capturing an image when an amount of sclera is visible in a preview image comprises a photosensor configured to detect an image, a memory configured to store at least a sclera setting, a processor configured to determine when at least one face is present in the detected image and further configured to determine an amount of sclera present in the face so that the determined amount of sclera is compared to the sclera setting, and an actuator configured to initiate capture of the detected image such that the detected image is captured when the determined amount of sclera is at least equal to the sclera setting.