Photodestructive effect of IR laser radiation on the cornea

Podol'tsev, Alexander S.; Zheltov, G. I.

doi:10.1134/s0030400x07010250

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…6. Few seconds after the cancellation of laser source, temperature distribution in the eye equals that of steady-state case, shown on the left, on same Figure. Podol'tsev [2] reported maximum rise of 19.8 • C at the center of laser spot, for this wavelength.…”

Section: Nm Ho:yag Lasermentioning

confidence: 99%

Thermal modelling of the human eye exposed to infrared radiation of 1064 nm Nd:YAG and 2090 nm Ho:YAG lasers

Peratta¹,

Poljak²

2009

Environmental Health Risk V

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In the last few decades laser eye surgery has been implemented in various ophthalmic procedures. The most important issue with laser eye surgery is the estimation of temperature rise in eye tissues due to the absorption of high intensity laser radiation. The 2D model of the human eye, using the Finite Elements Method, is developed in order to study the temperature distribution in human eyes subjected to radiation by two infrared lasers, the 1064 nm Nd:YAG and the 2090 nm Ho:YAG laser. The mathematical model is based on the space-time dependent Pennes' bioheat transfer equation supplemented with natural boundary condition equations for the cornea and the sclera. The results could prove to be useful in predicting the damage to intraocular tissues due to heating by infrared laser radiation.

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Section: Nm Ho:yag Lasermentioning

confidence: 99%

Thermal modelling of the human eye exposed to infrared radiation of 1064 nm Nd:YAG and 2090 nm Ho:YAG lasers

Peratta¹,

Poljak²

2009

Environmental Health Risk V

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“…Regarding the infrared radiation by a laser used for thermokeratoplasty, Manns et al [15] presented the semianalytical model for corneal tissue slab, and Pustovalov et al [16] model of the corneal tissue layers, respectively, while Podolt'sev and Zheltov [17] used the multilayered cylindrical model of the eye to study destructive effects on the cornea. Finally, Ooi et al [18] presented the transient model using the boundary element method.…”

Section: Introductionmentioning

confidence: 99%

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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“…This model is an extension to a previous 2D model [6] and aims to give more a realistic representation of the temperature field inside the human eye when subjected to a radiation of 694.3 nm Ruby laser, widely used in ophthalmology operations, such as posterior capsulotomy (after-cataract), peripheral iridotomy (treatment of glaucoma), for retinal photocoagulation [7,8].…”

Section: Introductionmentioning

confidence: 99%

3D FEM temperature distribution analysis of the human eye exposed to laser radiation

Cavka¹,

Poljak²,

Peratta³

2010

Advanced Computational Methods and Experiments in Heat Transfer XI

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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.

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Photodestructive effect of IR laser radiation on the cornea

Cited by 5 publications

References 6 publications

Thermal modelling of the human eye exposed to infrared radiation of 1064 nm Nd:YAG and 2090 nm Ho:YAG lasers

Thermal modelling of the human eye exposed to infrared radiation of 1064 nm Nd:YAG and 2090 nm Ho:YAG lasers

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

3D FEM temperature distribution analysis of the human eye exposed to laser radiation

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