Progress and prospect of non-invasive detection techniques in the therapeutic evaluation of melasma

The practice of brightening and unifying skin tone dates back over many years in different communities around the world, typically by people with skin phototypes IV-VI. Even skin tone and skin homogeneity are highly desired beauty attributes, influencing consumer demand for skin radiance cosmetic products or drugs. 1 Several agents with different mechanisms of action are commonly misused, 2,3 such as topical steroids that bleach the skin and reduce its thickness, [4][5][6] and hydroquinone that reduces melanosome formation leading to melanocyte necrosis 3 and is now considered as potentially carcinogenic. 2,7 To promote inclusiveness and satisfy the consumer, the challenge remains to develop safe technologies providing perceivable benefits in skin tone evenness, while respecting the individual

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Combining the use of two non‐invasive instruments to confirm that a formula can improve skin luminance while respecting constitutive melanogenesis

Dormael

Guéniche

Bastien

et al. 2022

J of Cosmetic Dermatology

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Application of the Hyperspectral Imaging Method to Assess the Effectiveness of Permanent Makeup Removal

et al. 2023

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The growing popularity of permanent makeup is associated with an increase in the need for treatments that effectively remove pigments from the skin. The risk of the radiation wavelength not being adjusted to the spectral ranges of individual pigments that compose the final color appears because complex dye compositions are used for permanent makeup. Incorrectly selected laser parameters may reduce the effectiveness of the treatment and increase the risk of thermal damage, leading to scarring and discoloration. The aim of the study was to evaluate the effectiveness of laser permanent makeup removal using hyperspectral imaging. Five different dyes were implemented into the skin of the pig’s ear. Then the dyes were removed using a Q-switched Nd:YAG laser. During the study, skin measurements were performed with a hyperspectral camera before and after laser application. The results were analyzed using GLCM, reflectance, and quadratic tree decomposition. Based on the obtained results, it was found that the most difficult dye to remove is white because it is characterized by high reflectivity of electromagnetic radiation. After the dye removal, there was a decrease in reflectance and contrast of GLCM and an increase in homogeneity for all dyes except for white. After the laser application, the pigments were distributed more equally in the skin.

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Progress and prospect of non-invasive detection techniques in the therapeutic evaluation of melasma

Cited by 2 publications

References 18 publications

Combining the use of two non‐invasive instruments to confirm that a formula can improve skin luminance while respecting constitutive melanogenesis

Combining the use of two non‐invasive instruments to confirm that a formula can improve skin luminance while respecting constitutive melanogenesis

Application of the Hyperspectral Imaging Method to Assess the Effectiveness of Permanent Makeup Removal

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