Optimization of Laser Surgery of the Secondary Cataract

Baum, Olga I.; Romanov, O. G.; Gamidov, A.A.; Федоров, А. А.; Romanov, G. S.; Zheltov, G. I.; Sobol, Emil N.

doi:10.18786/2072-0505-2016-44-2-130-139

Cited by 3 publications

(2 citation statements)

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“…Different studies showed that at the YAG-laser wavelength (1064 nm) the effective absorption coe cient (µ eff ) of laser radiation is determined by light scattering processes -we continued this study using high-speed photodetectors [11,12]. The development and deepening of methods for studying the response of cells, tissues, organs, and the body to laser exposure is essential [13]. The results of these studies will serve as a basis for further development of laser medicine as well as for adjustment of current maximum permissible limits of laser exposure [14,15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Ophthalmic YAG-Laser Pulses Inside the Animal Eyes Using an Sscilloscope

Bantsykina

Малов

Grishanov

et al. 2022

Preprint

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Purpose to study laser irradiation inside the eye. Methods we performed simulation and analysis of the physical effects of YAG laser during laser capsulotomy on the enucleated eyes of mature chinchilla rabbits by pulses fixation with photodetectors and evaluation of them on an oscilloscope. Results our study shows that the effect of the laser pulse on the eye membranes can be measured with a high-speed photodetector, that the results are stable and reproducible, the obtained pulses have the same configuration at all recording points. Conclusion the pulse amplitudes behind the posterior capsule of the lens and at the retina, when the pulse is applied to the posterior capsule, have no statistical difference, this can be explained by diffuse scattering of laser radiation inside the eye by the inner surface of the eye. Using our experimental model, it is possible to calculate the peak of the pulse reaching the retina and use this data in further experiments and clinical practice.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Ophthalmic YAG-Laser Pulses Inside the Animal Eyes Using an Sscilloscope

Bantsykina

Малов

Grishanov

et al. 2022

Preprint

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“…The most common complication of laser intervention is transient hypertension of the eye associated with the inflammatory process against the release of prostaglandins in the acute period [5]. To date, there are no clear criteria for selecting laser radiation parameters that guarantee the absence of these complications during laser ablation of a clouded lens capsule, even though that attempts are being made to create algorithms that help to reduce the number of complications associated with laser intervention [6,7]. As before, to achieve the result, the tactics of stepwise increase in energy to threshold values that allow for cutting the target tissue are more often used.…”

Section: Introductionmentioning

confidence: 99%

Laser Effect on a Pathologically Altered Capsule of the Lens of the Eye

Baum

Yuzhakov

Gamidov

et al. 2022

Journal of Biomedical Photonics & Engineering

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One of the current areas of application of lasers in ophthalmology is cataract surgery and reducing the number of negative reactions to surgical intervention. In the postoperative period, clouding of the lens capsular bag and the risk of contraction capsular syndrome associated with changes in the biomechanical properties of the lens and capsular bag system are often observed. In the work, the biomechanics of such system were studied. Lenses that were placed in a 10% formalin solution to create cataract-simulating opacity for various amounts of time were studied by optical-coherent tomography, speckleinterferometry method and with fiber-optics setup for scattering dynamics registration. It was shown that speckle interferometry technique is sensitive to structural changes of lenses due to formalin exposure, which makes tissue more elastic and less transparent. OCT shows the same result and is more sensitive to the changes of laser wavelength. In addition, theoretical studies were carried out and have shown that changing laser wavelength can be dangerous for the integrity of the capsule film during medical intervention due to increase of maximum thermal stress.

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Numerical simulation of Thermomechanical Effects in Absorbing Liquids upon Excitation by Pulsed Laser Radiation

Romanov

Plavskii

Baum

2022

Nonlinear Phenomena in Complex Systems

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Using the method of numerically solving the equations of motion of continuous media in the Lagrange form, simulations of the processes of excitation of pulsed acoustic beams during heating of absorbing liquids under an action of pulsed laser radiation has been carried out. The calculation of three-dimensional fields of temperature, pressure, density and velocity under the action of laser pulses with Gaussian spatial profile has been performed.

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Optimization of Laser Surgery of the Secondary Cataract

Cited by 3 publications

References 0 publications

Analysis of the Ophthalmic YAG-Laser Pulses Inside the Animal Eyes Using an Sscilloscope

Analysis of the Ophthalmic YAG-Laser Pulses Inside the Animal Eyes Using an Sscilloscope

Laser Effect on a Pathologically Altered Capsule of the Lens of the Eye

Numerical simulation of Thermomechanical Effects in Absorbing Liquids upon Excitation by Pulsed Laser Radiation

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