Document Detail

Evaluation of dark circles of the lower eyelid: comparison between reflectance meters and image processing and involvement of dermal thickness in appearance.
MedLine Citation:
PMID:  18412554     Owner:  NLM     Status:  MEDLINE    
BACKGROUND/AIMS: Dark circles of the lower eyelid (DCLE) represent a well-known beauty problem. The pathogenesis of DCLE is obscure, although stasis and hyperpigmentation of the eyelids have been considered to be involved. One reason for the small number of studies on DCLE may be the difficulty in measuring such soft and curved skin as the eyelids using bulky reflectance meters. The purpose of this study was to quantitatively analyze DCLE using various bioengineering methods. METHODS: The lower eyelid and cheek areas of 14 subjects with DCLE and 28 without DCLE were examined using two kinds of reflectance meters and image analysis to measure erythema index (EI), melanin index (MI), and oxygenation index (OX). Ultrasound echo images were also recorded to evaluate the thickness and echo density of the dermis. An in vitro model using collagen gel and hemoglobin solution was also examined as a phantom of eyelid skin. RESULTS: When contact-type reflectance meters were used, no significant differences in EI, MI, and OX were found between groups with and without DCLE. However, mean values of both MI and EI at eyelids were significantly higher in subjects with DCLE on image analysis, paralleling the results of inspection. Mean dermal thickness was significantly smaller in subjects with DCLE. CONCLUSION: Evaluation of EI and MI by image processing methods seems suitable for quantitative evaluation of DCLE, since inadequate contact of the measuring head with the skin is avoided. Whether stasis or hyperpigmentation is more responsible for DCLE remains uncertain. Dermal thickness of eyelid skin may be involved in the appearance of DCLE.
Hiroshi Ohshima; Hirotsugu Takiwaki
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article    
Journal Detail:
Title:  Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI)     Volume:  14     ISSN:  1600-0846     ISO Abbreviation:  Skin Res Technol     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-16     Completed Date:  2008-05-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9504453     Medline TA:  Skin Res Technol     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  135-41     Citation Subset:  IM    
POLA Chemical Industries Inc., Yokohama, Japan.
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MeSH Terms
Colorimetry / methods*
Computer Simulation
Dermoscopy / methods*
Eyelids / anatomy & histology,  physiology*
Image Interpretation, Computer-Assisted / methods*
Models, Biological
Photometry / methods*
Reproducibility of Results
Sensitivity and Specificity
Skin / anatomy & histology
Skin Pigmentation / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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