The light environment has an influence on human performance. The objective of this research is to analyse the factors of the luminous environment that intervene in the short-term memorization through the use of computer screens. The experiment was carried out in an artificial lighting laboratory, where 30 gender - differentiated subjects, carried out in six lighting stages memorization and perception of visual comfort tests, designed with three different illuminations in the horizontal work plane and two colours background reflected on the screens. The memorization tests consisted of remembering lists with nonsense syllables on a computer screen during two minutes for each stage. The perception of visual comfort was determined by the subjects with a scale designed with values of perception of the environment in darkness, comfort and dazzling. The data obtained indicate that there is a differentiated tendency between men and women in the process of memorization and the perception of the environment. In addition, comfort environments in the use of a computer are not highly illuminated and enviroments with lower luminances are preferred.