WIT Press


3D FEM Temperature Distribution Analysis Of The Human Eye Exposed To Laser Radiation

Price

Free (open access)

Paper DOI

10.2495/HT100261

Volume

68

Pages

10

Page Range

303 - 312

Published

2010

Size

1,854 kb

Author(s)

M. Cvetkovi´c, D. ˇCavka, D. Poljak & A. Peratta

Abstract

This paper is an extension of a previously published work on thermal modelling of the human eye exposed to radiation by various lasers. The 2D model is now extended to 3D in order to give a more realistic representation of the human eye model when irradiated by laser. The model is based on space-time dependent Pennes’ bio-heat transfer equation solved by the finite elements method featuring Galerking-Bubnov procedure. The results for the temperature field inside the eye could prove to be useful in minimising the possible damage to intraocular tissues during the ophthalmological procedures and also later in analysis of laser-tissue interaction mechanisms. Also, analysis of various parameters on the calculated temperature distribution is carried out. 1 Introduction The last few decades have witnessed an expansion of laser usage in various ophthalmological operations. Nowadays, medical lasers cover wavelengths from ultraviolet to the infrared parts of the electromagnetic spectrum. An increasing number of laser uses and spread of different types of eye surgeries has led to a need for quantitatively understanding basic laser-tissue interaction. Due to this fact, a number of models [1–5] were developed to predict the various processes inside the eye, with the goal of helping ophthalmologists in minimizing the possible damage to ocular tissue while operating with laser. The interaction of light with tissue results in either a transmission, reflection, scattering, or absorption of this light. Inmodelling laser-tissue interaction, themost important among these is absorption, since absorbed light is re-emitted as radiant

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