A mechanical model of ocular bulb vibrations and implications for acoustic tonometry

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The research reveals two main sources of dependency on IOP: "geometric" stiffening due to an increase in pre-stress and "material" stiffening resulting from the nonlinearity of the stress-strain curve of the sclera, with the latter being the dominant factor. It also notes that while the oscillation frequencies do depend on ocular rigidity, this dependency becomes significant only at relatively high values of IOP, making IOP the primary determinant of ocular vibration frequencies under physiological conditions. Furthermore, the study finds that the rheological properties of the vitreous predominantly affect vibration damping. This work not only enhances the understanding of the mechanical behavior of the eye under dynamic conditions but also has significant implications for non-contact intraocular pressure measurement techniques like acoustic tonometry, potentially influencing the approach to diagnosing and understanding ocular pathologies, such as traumatic retinal detachment​

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