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Related Experiment Video

Updated: May 10, 2026

Corneal Tissue Engineering: An In Vitro Model of the Stromal-nerve Interactions of the Human Cornea

Corneal Tissue Engineering: An In Vitro Model of the Stromal-nerve Interactions of the Human Cornea

Published on: January 24, 2018

Three-dimensional model for human anterior corneal surface.

Suilian Zheng¹, Jinglu Ying, Bo Wang

¹The Second Affiliated Hospital of Wenzhou Medical College, Department of Ophthalmology, Wenzhou 325027, China.

Journal of Biomedical Optics

|June 26, 2013

Summary

This summary is machine-generated.

This study introduces a novel method to accurately model the anterior corneal surface using asphericity (Q) values. This approach provides a complete 3-D anterior corneal model, improving upon existing methods for corneal shape analysis.

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Published on: October 21, 2022

Area of Science:

Ophthalmology
Biomedical Engineering
Optometry

Background:

Accurate modeling of the anterior corneal surface is crucial for understanding vision and designing ophthalmic devices.
Existing methods may not fully capture the complex aspheric nature of the cornea.

Purpose of the Study:

To develop and validate a method for constructing a customized 3-D anterior corneal model using asphericity (Q) values.
To analyze the 360-semimeridional variation of Q-values and their distribution on the anterior corneal surface.

Main Methods:

Acquisition of tangential power maps using Orbscan II in 66 young adults.
Calculation of anterior corneal asphericity (Q) values with tangential radius for each semimeridian.
Application of polynomial fitting to model the variation of Q-values across all meridians.

Main Results:

A seventh-degree polynomial function accurately fitted the 360-semimeridional Q-value variation (goodness of fit >0.9).
The Q-value distribution exhibited bimodal variation and became less negative from horizontal to vertical semimeridians.
The 3-D anterior corneal surface model approximated a prolate ellipsoid.

Conclusions:

The developed method enables precise calculation of Q-values for any semimeridian, yielding a complete anterior corneal shape.
This technique offers a more comprehensive representation of the anterior corneal surface compared to general models.