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R.I. Park; Human Eye Simulation II: Retinal Stresses Generated During Medial Saccadic Eye Movements . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2993.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To describe the theoretical intraretinal stresses generated during a medial saccadic eye movement (internal rotation) of the right eye. Methods: A 3 dimensional dynamic finite element model of a complete right human eye was created using a comercially available finite element program. An angular acceleration simulating an internal rotation was applied to the eye through the medial rectus muscle. The eye was accelerated from rest to 125 RPM and back to rest over 59 msec, modelling a moderate saccadic movement. The intraretinal stresses were extracted from the model and analyzed. Results: The peak intraretinal stresses during the internal rotation of the eye were generated in the supero-nasal quadrant and secondarily in the supero-temporal quadrant during acceleration. The magnitude of the peak stresses demonstrated a maximum approaching 1 KPa. Conclusions: The distribution and magnitude of intraretinal stresses during internal rotation may be predicted through Human Eye Simulation, a dynamic finite element model of the human eye. In the current model, intraretinal stresses generated during internal rotation were similar in magnitude and location to those generated during lateral saccadic eye movement and correspond to the quadrants of most frequent retinal tear. Identification of the location, magnitude, and timing of the generation of intraretinal stresses may aid in comprehension of the mechanism of retinal tear and detachment generation. View OriginalDownload SlideView OriginalDownload Slide
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