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Updated: Apr 29, 2026

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
Published on: March 1, 2017
On facial asymmetry and self-perception
Stephen M Lu1, Scott P Bartlett
1Philadelphia, Pa. From the Division of Plastic Surgery, Perelman School of Medicine at the University of Pennsylvania, and The Children's Hospital of Philadelphia.
Self-perception of appearance is distorted by mirrors and photos, which do not accurately represent facial features or emotional expressions. Understanding these visual discrepancies is crucial for accurate patient consultations.
Area of Science:
- Psychology
- Medical Imaging
- Facial Analysis
Background:
- Self-perception is a long-standing human interest, vital in medical consultations.
- Mirrors and photographs are primary tools for patients to view their appearance, but they distort reality.
- Patients often misunderstand how imaging technologies alter their true appearance.
Purpose of the Study:
- To highlight the discrepancies between self-perception and objective appearance due to imaging limitations.
- To explain the impact of facial asymmetry and "facedness" on self-perception.
- To propose technological and counseling strategies to mitigate these issues.
Main Methods:
- Analysis of visual perception principles related to mirrors and photography.
- Discussion of facial asymmetry and emotional expression lateralization ("facedness").
- Review of current technologies used for appearance evaluation.
Main Results:
- Mirrors and photographs create inaccurate representations of facial appearance and asymmetry.
- The phenomenon of "facedness" is reversed in mirrors, leading to misperceptions.
- A significant gap can exist between patient self-perception and third-party (e.g., surgeon) views.
Conclusions:
- Technological limitations in imaging tools significantly impact patient self-perception.
- Addressing "facedness" and imaging distortions is key for accurate preoperative and postoperative consultations.
- Integrating technology and patient counseling can improve the understanding of appearance.
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