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Baum OI, Omelchenko AI, Kasyanenko EM, Skidanov RV, Kazanskij NL, Sobol EN, Bolshunov AV, Siplivy VI, Osipyan GA, Gamidov AA, Avetisov SE. [New biophotonics methods for improving efficiency and safety of laser modification of the fibrous tunic of the eye]. Vestn Oftalmol 2018; 134:4-14. [PMID: 30499533 DOI: 10.17116/oftalma20181340514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The article describes a newly developed and tested diffractive optical element (DOE) that converts non-uniform radiation of the laser output into a homogeneous ring. The Gerchberg-Saxton algorithm is shown to be well suited for achieving annular intensity distribution. Testing this ring transducer on threshold-plasticity cornea demonstrated the reversibility of axisymmetric changes in the cornea. Atomic-Force microscopy of the area of maximum stresses in the corneal periphery showed no significant changes in the structure of the cornea when irradiated in the selected mode. Measurement of Young's modulus of the corneal surface areas after their irradiation also revealed no changes in the elastic properties, while examination of the corneal structure demonstrated the absence of significant structural changes in irradiated samples compared with intact ones.
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Affiliation(s)
- O I Baum
- Institute of Photon Technologies, Federal Scientific Research Centre 'Crystallography and Photonics', 2 Pionerskaya St., Moscow, Troitsk, Russian Federation, 142190
| | - A I Omelchenko
- Institute of Photon Technologies, Federal Scientific Research Centre 'Crystallography and Photonics', 2 Pionerskaya St., Moscow, Troitsk, Russian Federation, 142190
| | - E M Kasyanenko
- Institute of Photon Technologies, Federal Scientific Research Centre 'Crystallography and Photonics', 2 Pionerskaya St., Moscow, Troitsk, Russian Federation, 142190
| | - R V Skidanov
- Image Processing Systems Institute, Federal Scientific Research Centre 'Crystallography and Photonics', Samara, Russian Federation, 443001
| | - N L Kazanskij
- Image Processing Systems Institute, Federal Scientific Research Centre 'Crystallography and Photonics', Samara, Russian Federation, 443001
| | - E N Sobol
- Institute of Photon Technologies, Federal Scientific Research Centre 'Crystallography and Photonics', 2 Pionerskaya St., Moscow, Troitsk, Russian Federation, 142190
| | - A V Bolshunov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - V I Siplivy
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021; I.M. Sechenov First Moscow Medical University, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
| | - G A Osipyan
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - A A Gamidov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021
| | - S E Avetisov
- Research Institute of Eye Diseases, 11A Rossolimo St., Moscow, Russian Federation, 119021; I.M. Sechenov First Moscow Medical University, 8-2 Trubetskaya St., Moscow, Russian Federation, 119991
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