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Residual deformations in ocular tissues.

Ruoya Wang¹, Julia Raykin², Rudolph L Gleason³

¹George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0363, USA.

Journal of the Royal Society, Interface

|March 6, 2015

Summary

This summary is machine-generated.

Residual deformations in the eye

Keywords:

choroid ocular wall mechanics residual stresses and strains retina sclera

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Area of Science:

Ocular Biomechanics
Connective Tissue Physiology
Glaucoma Research

Background:

Residual deformations significantly impact the biomechanical environment of connective tissues.
The sclera plays a crucial role in ocular biomechanics, particularly in conditions like glaucoma.

Purpose of the Study:

To quantify residual deformations in the sclera, choroid, and retina.
To investigate the underlying causes of these deformations in ocular tissues.

Main Methods:

Two novel approaches were developed using porcine eyes to measure residual deformations.
Method 1: Quantifying area and eccentricity changes in punched tissue discs.
Method 2: Measuring curvature changes in scleral rings after stress-relieving cuts.

Main Results:

The choroid exhibited significant areal contraction (42%), while the sclera and retina showed modest contractions.
Asymmetric contractions were observed in the posterior ocular wall tissues.
Scleral rings displayed residual bending deformations, indicated by a decrease in curvature after cuts.

Conclusions:

Residual bending deformations in the sclera may stem from heterogeneous growth during development.
Residual areal deformations in the choroid are likely linked to its elastic fiber network and vascular bed.
Incorporating residual deformations into biomechanical models is crucial for understanding ocular wall mechanics.