...Ru Wang; Jheng-Han Tsai; Martin P. Snead; Philip Alexander; D. Ian Wilson The interface between silicone oil and saline layers in a three-dimensional model of the eye chamber was studied under different eye-like saccadic motions in order to determine the stability of the interface and propensity...

... of the sclera. Because of the nonlinearity of the stress-strain curves, it is usually difficult to extract a single value of elastic modulus, since the stiffness of the eye is dependent on the IOP level. Therefore, the values should be carefully interpreted. Whenever possible, we are reporting ranges of tangent...

... to normal AH flow by buoyancy induced due to temperature gradient. This shear stress is higher on the central region of the cornea. The results also depict that eye saccade imposes a 3D complicated flow field in the AC consist of various vortex structures. Finally, the enchantment of heat transfer in the AC...

...S. Salimi; S. Simon Park; T. Freiheit The vibration characteristics of shell structures such as eyes have been shown to vary with intraocular pressure (IOP). Therefore, vibration characteristics of the eye have the potential to provide improved correlation to IOP over traditional IOP measurements...

... , “ The Optic Nerve Head as a Biomechanical Structure: A New Paradigm for Understanding the Role of IOP-Related Stress and Strain in the Pathophysiology of Glaucomatous Optic Nerve Head Damage ,” Prog. Retin. Eye Res. , 24 ( 1 ), pp. 39 – 73 . 10.1016/j.preteyeres.2004.06.001 4 Ethier , C. R...

... properties of the OFCT. From 5 pairs of 76- to 92-year-old Caucasian human eyes and 33 5- to 7-month-old porcine eyes, 5 human and 11 porcine OFCT samples were dissected at the posterior pole or adjacent to the pole in the vertical, horizontal, and radial directions. Sample dimensions were fixed or measured...

...Ashley A. Weaver; Eric A. Kennedy; Stefan M. Duma; Joel D. Stitzel Eye trauma results in 30,000 cases of blindness each year in the United States and is the second leading cause of monocular visual impairment. Eye injury is caused by a wide variety of projectile impacts and loading scenarios...

... eyes of a patient who underwent laser-assisted in situ keratomileusis (LASIK) for myopic astigmatism were modeled. Pre- and postoperative Scheimpflug anterior and posterior corneal elevation maps were imported into a 3D corneo-scleral FEM with an unrestrained limbus. Preoperative corneal hyperelastic...

...Tingting Juan; Jean-Pierre Hubschman; Jeff D. Eldredge Vitrectomy is an ophthalmic microsurgical procedure that removes part or all of the vitreous humor from the eye. The procedure uses a vitreous cutter consisting of a narrow shaft with a small orifice at the end through which the humor...

... the method may work better in, e.g., the mouse. 05 10 2009 10 06 2010 22 06 2010 26 08 2010 26 08 2010 biological tissues biomechanics biomedical optical imaging cellular biophysics elastic moduli eye osmosis swelling modulus of elasticity lens capsule...

... indentation can deform the eye globe and consequently rotate the iris root. In this work, we studied the fluid-structure interaction between the iris and aqueous humor, driven by iris root rotation. The iris root rotation obtained from our previous whole-globe model was used as a boundary condition...

... of the intraocular pressure (IOP) to optic nerve damage and hence visual impairment. For this reason, IOP measurement in tonometry has become an essential part of routine eye examinations needed for the diagnosis and management of the disease. The accuracy of the current reference standard in tonometry, the Goldmann...

... set obtained at Moorfields Eye Hospital involving 144 subjects, and found to produce IOP estimates that are less dependent on corneal size and age than published equations. biomechanics biomedical equipment biomedical measurement eye indentation pressure measurement tonometry...

...Michaël J. A. Girard; J. Crawford Downs; Claude F. Burgoyne; J.-K. Francis Suh The sclera is the white outer shell and principal load-bearing tissue of the eye as it sustains the intraocular pressure. We have hypothesized that the mechanical properties of the posterior sclera play a significant...

... optic nerve head—the primary site of damage in the disease. The posterior scleral shells from both eyes of one rhesus monkey were individually mounted on a custom-built pressurization apparatus. Intraocular pressure was incrementally increased from 5 mm Hg to 45 mm Hg , and the 3D displacements were...

...Matthew Reilly; Nathan Ravi Debate regarding the mechanisms of how the eye changes focus (accommodation) and why this ability is lost with age (presbyopia) has recently been rejoined due to the advent of surgical procedures for the correction of presbyopia. Due to inherent confounding factors...

...-0404 Newton , R. H. , and Meek , K. M. , 1998 b, “ The Integration of the Corneal and Limbal Fibrils in the Human Eye ,” Biophys. J. , 75 , pp. 2508 – 2512 . 0006-3495 Aghamohammadzadeh , H. , Newton , R. H. , and Meek , K. M. , 2004 , “ X-Ray Scattering Used...

... the NT and IS orientations in the central cornea to a circumferential orientation in the limbus. A unique combination of mechanical strength, stiffness, and optical transparency enables the cornea to serve as both a protective barrier and the primary refractive component of the eye...

...Michaël J. A. Girard; J. Crawford Downs; Claude F. Burgoyne; J.-K. Francis Suh To experimentally characterize 2D surface mapping of the deformation pattern of porcine peripapillary sclera following acute elevations of intraocular pressure (IOP) from 5 mm Hg to 45 mm Hg . Four porcine eyes were...

.... , 35 ( 1 ), pp. 24 – 31 . Macular Photocoagulation Study Group , 1993 , “ Five-Year Follow-up of Fellow Eyes of Patients With Age-Related Macular Degeneration and Unilateral Extrafoveal Choroidal Neovascularization ,” Arch. Ophthalmol. (Chicago) 0003-9950 , 111 , pp. 1189 – 1199...