Abstract
A 3-D numerical model of the human eye is developed to study the conduction and convection heat transfer due to an argon laser iridectomy and to explain in which way the corneal burns and lens opacities depend on the laser parameters. The equations of mass, momentum and energy conservation, supplemented by boundary and initial conditions are discretized in three spatial dimensions and in time according to respectively the finite element method and to an implicite integration scheme. The contraction burn process was studied using shot of 0.5 s in duration, 0.5 mm in size and a power level of 0.4 W. The influence of the natural convection and the phenomena of cornea and lens overheating are presented and discussed.
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