Eye products are important for many people as a tool to improve interpersonal impressions, but the dissatisfaction with usability is known to increase with age. Although the change in the physical properties of eyelid skin due to aging is considered to be one of the major factors that change the usability of eye makeup products, the detailed relationship is still unclear. The main evaluation methods for eye makeup usability are sensory evaluations, but they cannot separate the influence of individual differences from that of aging.

It is difficult to objectively evaluate eyelids due to their characteristic shape and sensitive parts. For objective evaluation without using human skin, artificial skin models are useful tools. However, the existing models did not consider the effects of physical properties with age. In this study, we prepared various eyelid models with different artificial skin parameters to consider different ages, while incorporating changes of eyelid skin structure with age and the anatomical structure of eyelids.

To select the appropriate model for each age, we evaluated the touch sensation and movement of these eyelid models, and then compared them with those of human eyelids of different ages. These age-specific eyelid models reproduced the declined usability of eyeshadow and eyeliners on aged human skin, suggesting that the physical properties of eyelid skin affect the usability of eye makeup products.

Read more…

Rina Watanabe, Ryo Hagino, Fuko Imade, Yosuke Mori, Masaki Okuyama © 2021 The Society of Cosmetic Chemists of Japan