Surgeon uses ALGOR FEA tools28 Feb, 2003 By: Don LaCourse Cadalyst
Surgeon uses ALGOR FEA tools to simulate eye movementDr. Robert Park, an eye surgeon with Consultants of Boston and the Tufts University School of Medicine, drew on his background as a mechanical engineer to apply FEA (finite-element analysis) to ferreting out the causes of retinal detachments. Park is using ALGORs MES (mechanical event simulation) software to simulate eye movement and accompanying stresses to investigate why nearsighted people are more at risk for retinal detachment and whether patients need to avoid activity after retinal surgery.
Park earned a B.S. degree in material science and engineering from MIT. For his senior thesis, he used FEA as part of his analysis and redesign of lacrosse helmets. He then worked as an engineer for several years before going on for a medical degree. When he became
Figure 1. Park modeled the eye in detail in ALGOR Superdraw, then defined FEA properties such as materials and constraints.
Park chose ALGORs MES because it could predict stresses for a complete biomechanical model based on acceleration and deceleration as well as forces. He first created a detailed model of the entire eye (figure 1), making each element a unique part to consider the material properties of different types of tissues. He then applied rotation to represent a rapid shift in eye position. The highest stress levels appeared in the top outside quadrant of the eye (figure 2), which is where most detachments occur.
Figure 2. This simulation of a 30