1. A computer program product for facial recognition processing using biometric pre-filters, the computer program product comprising: a computer readable storage medium and program instructions stored on the computer readable storage medium, the program instructions comprising: program instructions to determine (i) a first eye-to-eye distance and (ii) a first mid-eye to nose-tip distance of a first detected face of a first image, wherein the first detected face includes two eyes, and wherein the first eye-to-eye distance is a biometric measurement taken from a center of a first eye to a center of a second eye of the first detected face; program instructions to determine a first ratio, wherein the first ratio is a biometric measurement defined by a ratio of the first eye-to-eye distance to the first mid-eye to nose-tip distance of the first detected face of the first image; program instructions to determine a first triangle, wherein the first triangle is a biometric measurement defined by points corresponding to the center of the first eye, the center of the second eye, and a nose-tip of the first detected face of the first image; program instructions to receive a selection of a demographic characteristic; program instructions to determine a search range for the first eye-to-eye distance based, at least in part, on the selection of the demographic characteristic, and the first eye-to-eye distance, and wherein the determined search range is a numeric value; program instructions to determine a search range for the first triangle based, at least in part, on the selection of the demographic characteristic and the first triangle, and wherein the determined search range includes a range of a length for at least one side of the first triangle; program instructions to identify a second image from a plurality of images, wherein the second image includes a second detected face that includes a second eye-to-eye distance that is included in the determined search range for the first eye-to-eye distance; program instructions to determine a second ratio of the second eye-to-eye distance to a second mid-eye to nose-tip distance of the second detected face of the second image from the plurality of images, wherein the second ratio of the second eye-to-eye distance to the second mid-eye to nose-tip distance is a numeric value; program instructions to store the second ratio of the second eye-to-eye distance to the second mid-eye to nose-tip distance of the second detected face of the second image as a searchable data field; and program instructions to apply a facial recognition algorithm to the second image to determine at least one potential identity that is associated with the first detected face based, at least in part, on (i) the first ratio of the eye-to-eye distance to the first mid-eye to nose-tip distance, (ii) the second ratio of the second eye-to-eye distance to the second mid-eye to nose-tip distance, and (iii) at least one side of a triangle with a length that is included in the determined search range for the first triangle.