2020
DOI: 10.1070/qel17216
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Control of laser-beam spatial distribution for correcting the shape and refraction of eye cornea

Abstract: The results of calculation and development of a device aimed at forming a laser beam with an annular intensity distribution and spatial mode homogenisation, as well as approbation of this device for biological phantoms and eyes in ex vivo experiments with laser non-ablative correction of the cornea profile, are presented. The radiation intensities and thermal field distributions on the surfaces of a phantom and isolated rabbit’s eye are investigated. The absence of significant heating in the central region of … Show more

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Cited by 20 publications
(1 citation statement)
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“…Using a laser helps changing the conformation of collagen molecules located on the periphery of the cornea and in the limb. The method uses a special header that creates a circular distribution of the intensity of laser radiation [8][9][10][11], that allows us to achieve a more uniform effect of the weakening of mechanical stresses and leads to a reduction in laser-induced complications, since symmetric with respect to the paracentral zone cornea, but sequential irradiation of a number of points can lead to asymmetry of the corneal tension in the optical zone and the occurrence of astigmatism, keratoconus and other complications [8]. In addition, research is being carried out in the direction of developing a control system that allows one to determine the threshold for the onset of stress relaxation in the corneal tissues during laser irradiation.…”
Section: Introductionmentioning
confidence: 99%
“…Using a laser helps changing the conformation of collagen molecules located on the periphery of the cornea and in the limb. The method uses a special header that creates a circular distribution of the intensity of laser radiation [8][9][10][11], that allows us to achieve a more uniform effect of the weakening of mechanical stresses and leads to a reduction in laser-induced complications, since symmetric with respect to the paracentral zone cornea, but sequential irradiation of a number of points can lead to asymmetry of the corneal tension in the optical zone and the occurrence of astigmatism, keratoconus and other complications [8]. In addition, research is being carried out in the direction of developing a control system that allows one to determine the threshold for the onset of stress relaxation in the corneal tissues during laser irradiation.…”
Section: Introductionmentioning
confidence: 99%