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Updated: Mar 20, 2026

Surgical Correction for Pediatric Epiblepharon and Trichiasis

Surgical Correction for Pediatric Epiblepharon and Trichiasis

Published on: July 8, 2025

Chen's Double Eyelid Fold Ratio.

Chen-Chia Chen¹, Hao-Chih Tai¹, Chien-Lin Huang¹

¹Regent Aesthetic Surgery Clinic, Taipei, Taiwan; and Department of Plastic Surgery, National Taiwan University Hospital, Taipei, Taiwan.

Plastic and Reconstructive Surgery. Global Open

|May 21, 2016

Summary

This summary is machine-generated.

Double eyelidplasty significantly increases eye size in Asians with single eyelids by augmenting vertical dimensions. A new ratio measures perceived eye proportion for surgical outcome evaluation.

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Area of Science:

Oculoplastic surgery
Aesthetic surgery
Ophthalmology

Background:

Double eyelidplasty creates palpebral folds, enhancing beauty perception for Asians with single eyelids.
A novel palpebral parameter is proposed for quantitative assessment of surgical outcomes.
The study analyzes altered Asian eye proportions post-double eyelid surgery.

Purpose of the Study:

To quantitatively evaluate the aesthetic outcomes of double eyelidplasty in Asian patients.
To introduce and validate a new palpebral parameter for surgical assessment.
To analyze changes in the proportions of the eyebrow-eye aesthetic unit.

Main Methods:

Included 100 Asian adults with single upper eyelids satisfied with surgical results.
Performed retrospective measurements of palpebral parameters preoperatively and 6 months postoperatively.
Calculated and analyzed proportions within the eyebrow-eye aesthetic unit.

Main Results:

Double eyelidplasty increased the vertical dimension of the palpebral fissure by an average of 27.9%.
The vertical ratio of the palpebral fissure to the eyebrow-eye unit increased by 34.4%.
The vertical ratio of the subunit below the double eyelid fold peak increased by 82.6%.

Conclusions:

Double eyelidplasty substantially enlarges the vertical eye dimensions in Asians with single eyelids.
The perceived larger eye size results from the visual illusion of the eyelid fold and altered proportions.
A proposed vertical ratio of the subunit below the double eyelid fold peak offers a clinical tool for quantitative surgical outcome evaluation.