The present invention includes a method of measuring the efficacy of a skin treatment program on human skin. The method comprises: a. accessing a multiplicity of photographic images of human faces, each image having associated with it a chronological age of the human whose likeness it captures b. assessing the multiplicity of photographic images of human faces for a facial parameter c. scoring the facial parameter on each image according to a scoring system to create a parameter score for each image d. correlating the parameter scores to the chronological ages to obtain an age-parameter correlation e. scoring an untreated subject human face for the facial parameter to obtain a subject baseline parameter score f. treating the subject human face with a skin treatment program g. scoring the treated subject human face for the facial parameter to obtain a subject treatment parameter score h. determining the difference between the subject baseline parameter score and the subject treatment parameter score to obtain a treatment score difference and i. comparing the treatment score difference with the age-parameter correlation to determine a constructive age change of the human face effected by treatment of the human face with the skin treatment program.
