EEMCO guidance for the assessment of skin colour

Pierard, Gérald

doi:10.1016/s0926-9959(97)00183-9

Cited by 191 publications

(240 citation statements)

References 52 publications

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“…79 In general, absorption coefficients measured in vivo may be expected to be higher than in vitro values where the highly absorbing pigments from blood are removed from the samples. This is particularly true in the blue-green regions of the visible spectrum.…”

Section: In Vivo Absorption Coefficientsmentioning

confidence: 99%

Optical properties of human skin

2012

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Abstract. A survey of the literature is presented that provides an analysis of the optical properties of human skin, with particular regard to their applications in medicine. Included is a description of the primary interactions of light with skin and how these are commonly estimated using radiative transfer theory (RTT). This is followed by analysis of measured RTT coefficients available in the literature. Orders of magnitude differences are found within published absorption and reduced-scattering coefficients. Causes for these discrepancies are discussed in detail, including contrasts between data acquired in vitro and in vivo. An analysis of the phase functions applied in skin optics, along with the remaining optical coefficients (anisotropy factors and refractive indices) is also included. The survey concludes that further work in the field is necessary to establish a definitive range of realistic coefficients for clinically normal skin.

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Section: In Vivo Absorption Coefficientsmentioning

confidence: 99%

Optical properties of human skin

2012

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“…Skin MI and EI on facial sites: forehead, canthus, cheekbone, cheilion, and submaxilla were measured before and after treatment with a Mexameter (MX18, Courage & Khazaka, Electronic GmbH, Cologne, Germany) according to the EEMCO Recommendations [10]. Each site was measured three times and the mean value was calculated.…”

Section: Clinical Noninvasive Evaluationmentioning

confidence: 99%

A split‐face study of intense pulsed light on photoaging skin in Chinese population

Chen³

et al. 2010

Lasers Surg Med

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Background and Objectives: Intense pulsed light (IPL) is regarded as the gold standard of nonablative photorejuvenation. Yet there is still a need to observe its efficacy and safety on dark skin using a split-face module. Study Design/Materials and Methods: Twenty-four Chinese women with photoaging were enrolled in this study. Patients were randomized to receive four IPL treatments at 3-to 4-week intervals on one side of face, with the other side spared as control. Changes of photoaging were evaluated using a global evaluation, an overall self-assessment, a Mexameter and a Corneometer. Skin biopsies were taken after four sessions of treatment on one side of face. The melanocyte density and the contents of melanin, collagen fibers, and elastic fibers were stained and used to evaluate the improvement on dyschromia and other signs of photoaging. Results: The global scores of photoaging on treated side decreased significantly from 3.02 to 1.22, while it remained unchanged on the untreated side. Twenty-one of 24 patients (87.5%) rated their improvement as excellent or good. The difference on the values of melanin index and erythema index on treated side were significantly larger than those on untreated side after the 1st session, the 4th session and at 3-month follow-up (P<0.05). The melanin contents were significantly decreased and the collagen fibers were obviously increased only on treated side (P<0.05). Adverse effects of treated side were limited to mild pain and transient erythema. Conclusion: Using this split-face module, IPL treatment is proved both clinically and histologically to be effective in treating photoaging skin in Chinese population. Adverse effects were minimal and acceptable.

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“…Then, using a spectrophotometer (CM-2600D, Konica Minolta, Japan), an experienced lab technician measured eight selected parts of the face for each subject: center of the forehead, right cheekbone, right cheek, under the chin, left cheek, left cheek bone, philtrum, and under the lips. Each measurement was taken three times consecutively, and an average was calculated (Weatherall and Coombs 1992;Piérard 1998;Ahn et al 2002;Latreille et al 2007). …”

Section: Measurement Of Facial Tone L*a*b* Valuesmentioning

confidence: 99%

Facial Lab* values and preferred base makeup products among native Korean women: a clinical study

Jung¹,

Jo²,

Kwon³

et al. 2017

biomed dermatol

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Background: Bare face L*a*b* values are needed to serve as a standard reference point for the development of base makeup products for Korean women. Methods: A total of 543 Korean women ranging in age from their 20s to 50s underwent spectrophotometer skin analysis under constant temperature (22 ± 2%) and humidity (50 ± 5%) conditions. Eight parts of each subject's face (center of the forehead, right cheekbone, right cheek, under the chin, left cheek, left cheekbone, philtrum, and under the lips) were measured, and average values were calculated. Subjects were then asked to complete questionnaires regarding their use and preferences for base makeup products. Results: Skin tone was classified into three categories (dark, normal, bright) based on L* values. Compared with the contrast value, the dark group L* was 60.66 and the normal group L* was 63.87 (with a difference of 3.21), and the bright group L* was 66.66 (with a difference of 2.79 from the normal group). According to the survey responses regarding preferences and use of base makeup products, the most common answer for all respondents regardless of age was that their skin tone was average or slightly darker than that of their peers. Preferred base makeup products usually were found to be of slightly brighter color than actual skin tone. As in previous studies, the most frequently used base makeup product regardless of age was BB cream. Conclusions: Given that the average L* standard deviation between groups was 3, a difference of one step in skin tone may be considered to be equivalent to this L* value difference. The survey results suggest that target colors for base makeup product development should be brighter than bare face tones.

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EEMCO guidance for the assessment of skin colour

Abstract: The reader will be introduced to the origins of skin colours and with basic principles of their measurements. Methods of colour reading are reviewed with particular insight into practical procedures, pitfalls and correct interpretation of data.

Cited by 191 publications

References 52 publications

Optical properties of human skin

Optical properties of human skin

A split‐face study of intense pulsed light on photoaging skin in Chinese population

Facial Lab* values and preferred base makeup products among native Korean women: a clinical study

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EEMCO guidance for the assessment of skin colour

Abstract: The reader will be introduced to the origins of skin colours and with basic principles of their measurements. Methods of colour reading are reviewed with particular insight into practical procedures, pitfalls and correct interpretation of data.

Cited by 191 publications

References 52 publications

Optical properties of human skin

Optical properties of human skin

A split‐face study of intense pulsed light on photoaging skin in Chinese population

Facial L*a*b* values and preferred base makeup products among native Korean women: a clinical study

Contact Info

Product

Resources

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Facial Lab* values and preferred base makeup products among native Korean women: a clinical study