Imaging shear stress distribution and evaluating the stress concentration factor of the human eye

Scientific Reports
S Joseph Antony

Abstract

Healthy eyes are vital for a better quality of human life. Historically, for man-made materials, scientists and engineers use stress concentration factors to characterise the effects of structural non-homogeneities on their mechanical strength. However, such information is scarce for the human eye. Here we present the shear stress distribution profiles of a healthy human cornea surface in vivo using photo-stress analysis tomography, which is a non-intrusive and non-X-ray based method. The corneal birefringent retardation measured here is comparable to that of previous studies. Using this, we derive eye stress concentration factors and the directional alignment of major principal stress on the surface of the cornea. Similar to thermometers being used for monitoring the general health in humans, this report provides a foundation to characterise the shear stress carrying capacity of the cornea, and a potential bench mark for validating theoretical modelling of stresses in the human eye in future.

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Citations

Jul 7, 2015·Progress in Retinal and Eye Research·Keith M Meek, Carlo Knupp
Oct 30, 2016·PloS One·Markus A WenzelBenjamin Blankertz
Jul 5, 2017·Scientific Reports·S Joseph AntonyN Gozde Ozerkan
May 23, 2021·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Marcelina SobczakBarbara Pierścionek

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Methods Mentioned

BETA
X-ray

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