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What is the Main Potential Factor Influencing Ocular Protrusion?
Yinwei Li1, Yun Su1, Xuefei Song1
1Department of Ophthalmology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China (mainland).
Summary
Ocular protrusion is linked to orbital soft tissue volume and bony orbital volume ratio. Understanding these orbital parameters can improve surgical planning and predictability.
Area of Science:
- Ophthalmology
- Medical Imaging
- Anatomy
Background:
- Orbital parameters and their relationship to ocular protrusion are not fully understood.
- Establishing normal orbital ranges is crucial for clinical applications.
Purpose of the Study:
- To determine normal orbital parameters.
- To investigate the correlation between ocular protrusion and orbital morphological factors.
Main Methods:
- Retrospective case series of 56 subjects (112 orbits).
- 3D measurements of orbital morphology using Mimics v18.0 software.
- Statistical analysis including t tests and Pearson's correlation.
Main Results:
- Ocular protrusion significantly correlates with orbital soft tissue volume (OSTV), OSTV/bony orbital volume (BOV) ratio, orbital width, orbital height, and globe diameter.
- Strongest correlations found with OSTV/BOV ratio (males: r=0.90; females: r=0.87).
- No significant differences between right and left orbits.
Conclusions:
- The OSTV/BOV ratio, orbital aperture shape, and ocular axial length are key factors influencing ocular protrusion.
- These findings can enhance the predictability of orbital surgery outcomes.
- A developed database and regression formula may aid future surgical planning.
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