Jewellers' loupes typically use a triplet lens. Additionally, loupes can improve dentists' posture which can decrease occupational strain. Surgeons in many specialties commonly use loupes when doing surgery on delicate structures. For these purposes, the walls were measured out in units called "loupes", or embrasures. Loupes cut from mirror blanks were particularly in demand. Tattoo artists use loupes to inspect the quality of their needle tips. Loupes are also called hand lenses. Stamp collectors employ loupes to improve their ability to evaluate the quality of their stamps. Loupes are employed to assist watchmakers in assembling mechanical watches. Strippers use loupes in order to register film separations to one another. Loupes are also used in academia and life sciences, such as geology and biology. Loupes is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.