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Erschienen in: Aesthetic Plastic Surgery 6/2017

25.08.2017 | Original Article

Chen’s Double Eyelid Fold Illusion: An Eye Size Assimilation Illusion Induced by a Supratarsal Fold in the Brow–Eye Unit, A Preliminary Report

verfasst von: Sheng-Ni Chen, Sheng-Hung Chen, Chen-Chia Chen, Chien-Lin Huang, Hao-Chih Tai, Yong-Ping Wang

Erschienen in: Aesthetic Plastic Surgery | Ausgabe 6/2017

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Abstract

Background

Double eyelidplasty can enhance the eye size and facial attractiveness of Asian individuals with single eyelids. The authors hypothesize that a supratarsal fold can induce an eye size assimilation illusion to enhance eye dimensions and aesthetics, and seek to define the optimum vertical proportion between a supratarsal fold and the eye fissure associated with maximal induction of the size assimilation illusion.

Methods

A photometric study of the replicated photographs of ten female Taiwanese patients after double eyelidplasty was designed. Each photograph was edited by shifting the supratarsal folds vertically at a regular fold/eye ratio increment of 0.1. The perceived attractiveness of edited photographs of each patient was rated by 100 adult observers using a score of 1–5. The palpebral parameters were measured and analyzed.

Results

The mean rating score increased gradually when a supratarsal fold was added and peaked when the fold/eye ratio was 0.3 and the mean Chen’s double eyelid fold ratio was 0.631 ± 0.023. After the peak, the mean score decreased gradually and was lower than the photograph without a fold when the fold/eye ratio exceeded 0.5 and the mean Chen’s ratio exceeded 0.729 ± 0.027.

Conclusion

Within the optimal ranges of the fold/eye ratio and Chen’s double eyelid fold ratio, eyes are perceived as larger and more attractive due to a hybrid presentation of two interdependent eye size assimilation illusions induced by a supratarsal fold in the brow–eye unit. “Chen’s double eyelid fold illusion” is proposed to describe this complex visual phenomenon.

Level of Evidence IV

This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to Table of Contents or the online Instructions to Authors www.​springer.​com/​00266.
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Metadaten
Titel
Chen’s Double Eyelid Fold Illusion: An Eye Size Assimilation Illusion Induced by a Supratarsal Fold in the Brow–Eye Unit, A Preliminary Report
verfasst von
Sheng-Ni Chen
Sheng-Hung Chen
Chen-Chia Chen
Chien-Lin Huang
Hao-Chih Tai
Yong-Ping Wang
Publikationsdatum
25.08.2017
Verlag
Springer US
Erschienen in
Aesthetic Plastic Surgery / Ausgabe 6/2017
Print ISSN: 0364-216X
Elektronische ISSN: 1432-5241
DOI
https://doi.org/10.1007/s00266-017-0961-5

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