abstract "cosmetic or dermatological composition and non-therapeutic cosmetic process" the present invention deals with a cosmetic or dermatological composition in the form of an emulsion that comprises, in a physiologically acceptable support: a) at least one aqueous phase; b) at least one oily phase; c) at least one merocyanine compound of formula (1) or one of its geometric and / and- or e / z- isomeric forms; and d) at least one emusifying system that contains at least one twin surfactant. another object of the present invention consists of a non-therapeutic cosmetic treatment process for the care and / or make-up of the keratin material, which comprises the application on the surface of said keratin material of at least one composition as defined above. the present invention also deals with a non-therapeutic cosmetic process to limit darkening of the skin and / or improve the color and / or uniformity of the complexion, which comprises the application, on the surface of the keratin material, of at least one composition such as previously defined. the present invention also deals with a non-therapeutic cosmetic process to prevent and / or treat the signs of aging of a keratin material, which comprises the application on the surface of the keratin material, of at least one composition as previously defined.resumo “composição cosmética ou dermatológica e processo cosmético não terapêutico” a presente invenção trata de uma composição cosmética ou dermatológica em forma de emulsão que compreende, em um suporte fisiologicamente aceitável: a) pelo menos uma fase aquosa; b) pelo menos uma fase oleosa; c) pelo menos um composto merocianina de fórmula (1) ou uma das suas formas isoméricas geométricas e/e- ou e/z-; e d) pelo menos um sistema emuslficante que contém pelo menos um tensoativo gêmeo. outro objeto da presente invenção consiste de um processo de tratamento cosmético não terapêutico para o cuidado e/ou a maquilagem da matéria queratínica, que compreende a aplica