A boundary element model of the human eye undergoing laser thermokeratoplasty

Ooi, E. H.; Ang, W.T.; Ng, E. Y. K.

doi:10.1016/j.compbiomed.2008.04.003

Cited by 50 publications

(33 citation statements)

References 27 publications

(39 reference statements)

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“…In the normal human eye, the pupil diameter varies from 1.5 mm to about 8 mm, and is related to the ambient light conditions. It seems that the obtained temperatures, using the pupillary diameter value of 1.0 mm, much better fit the values reported by [15,18].…”

Section: Transient Analysis Of Pulsed Ho:yag Lasersupporting

confidence: 71%

“…Transient analysis of our model obtained significantly higher temperatures in the cornea (230.12 • C -node 3) after application of seven laser pulses, compared to other authors [15,18]. Those models reported temperatures around 110 • C, and in that respect our present model overestimates the temperature.…”

Section: Transient Analysis Of Pulsed Ho:yag Lasercontrasting

confidence: 39%

“…The I 0 e −αz part represents the Lambert-Beer's law, while the last exponential term in expression (6) represents the temporal profile of a power or intensity of each laser pulse used in our model, depicted on Figure 4. The parameters used for the Ho:YAG laser where similar to those in [18] and are given latter in the results Section.…”

Section: Modeling the Laser Sourcementioning

confidence: 99%

“…Finally, Ooi et al [18] presented the transient model using the boundary element method. Of these models, only that of Ooi et al [18] took into account the actual geometry of the human eye.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fetd Computation of the Temperature Distribution Induced Into a Human Eye by a Pulsed Laser

Cvetković¹,

Poljak²,

Peratta³

2011

PIER

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Abstract-In this paper we present the three-dimensional finite element time domain model of the human eye exposed to pulsed holmium: YAG laser radiation used in thermokeratoplasty procedure. The model is based on the Pennes' bioheat transfer equation and takes into account the focusing action of the lens. The absorption of laser energy inside the eye tissues is modeled using the Lambert-Beer's law. Model takes into account the pulse temporal profile. The maximum temperature values obtained from steady state and transient analysis are compared against those reported from other papers. Finally, sensitivity analysis of several parameters on the calculated temperature field is carried out.

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Section: Transient Analysis Of Pulsed Ho:yag Lasersupporting

confidence: 71%

Section: Transient Analysis Of Pulsed Ho:yag Lasercontrasting

confidence: 39%

Section: Modeling the Laser Sourcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fetd Computation of the Temperature Distribution Induced Into a Human Eye by a Pulsed Laser

Cvetković¹,

Poljak²,

Peratta³

2011

PIER

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“…The boundary element method has been used to solve various problems pertaining to the heat transfer inside biological tissues (Ooi et al 2007(Ooi et al , 2008. However, to the best of the authors' knowledge, boundary element models of the human skin that are developed specifically for studying burns owing to contact Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Prediction and parametric analysis of thermal profiles within heated human skin using the boundary element method

Tan

Ooi

2010

Phil. Trans. R. Soc. A.

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In this paper, an axisymmetric model of the human skin is developed to simulate the steady-state temperature distribution during contact with a hot solid. Simulations are carried out using the boundary element method. This study seeks to investigate the feasibility of using the boundary element method in the studies of burn. A sensitivity analysis is carried out to examine the effects of various parameters on the temperature distribution inside the skin during burn. Furthermore, a statistical analysis based on the Taguchi method is performed to determine the combination of factors that produce the desired outcome (least increase in temperature). In order to validate the accuracy of the numerical scheme, results obtained using the boundary element method are compared with the solutions obtained using the more established finite-element method.

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Numerical modeling of heat and mass transfer in the human eye under millimeter wave exposure

Karampatzakis

Samaras

2013

Bioelectromagnetics

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Human exposure to millimeter wave (MMW) radiation is expected to increase in the next several years. In this work, we present a thermal model of the human eye under MMW illumination. The model takes into account the fluid dynamics of the aqueous humor and predicts a frequency-dependent reversal of its flow that also depends on the incident power density. The calculated maximum fluid velocity in the anterior chamber and the temperature rise at the corneal apex are reported for frequencies from 40 to 100 GHz and different values of incident power density.

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A boundary element model of the human eye undergoing laser thermokeratoplasty

Cited by 50 publications

References 27 publications

Fetd Computation of the Temperature Distribution Induced Into a Human Eye by a Pulsed Laser

Fetd Computation of the Temperature Distribution Induced Into a Human Eye by a Pulsed Laser

Prediction and parametric analysis of thermal profiles within heated human skin using the boundary element method

Numerical modeling of heat and mass transfer in the human eye under millimeter wave exposure

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