Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction
The aim of this work is to implement an algorithm that simulates a simplified cutting surface based on laser-induced optical breakdown (LIOB). The algorithm includes the definition of a possible positioning of the laser pulses and calculation of the roughness for different parameter settings (includ...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/2/114 |
| _version_ | 1797297214537596928 |
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| author | Helen Amann Samuel Arba Mosquera |
| author_facet | Helen Amann Samuel Arba Mosquera |
| author_sort | Helen Amann |
| collection | DOAJ |
| description | The aim of this work is to implement an algorithm that simulates a simplified cutting surface based on laser-induced optical breakdown (LIOB). The algorithm includes the definition of a possible positioning of the laser pulses and calculation of the roughness for different parameter settings (including LIOB threshold, pulse energies, and spot spacings) as the difference between simulated and ideal target cut (local differences within the cut, i.e., the waviness of the simulated cut vs. the homogeneity of the ideal target cut). Furthermore, optimizations of specific variables, such as spot distance (along the pathway), track distance (between lines/tracks), and pulse energy, are performed. The simulations suggest that lower pulse energies (well above the LIOB threshold) combined with asymmetric spacings (spot-to-track distance ratio >> 1) may be effective to lower the roughness of laser cuts generated by LIOB processes. The importance of lowering pulse energies (well above the threshold) emphasizes the need for the LIOB threshold to remain low (as low as possible). Reducing roughness by decreasing spacings (thus, increasing dose for same pulse energies) may have negative implications in visual recovery (risk for overdose). In all cases, the roughness is multiple times larger (rougher) than equivalent simulations for ablative procedures. |
| first_indexed | 2024-03-07T22:17:09Z |
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| id | doaj.art-92ed2220268b47a5b9cd8175ac3a7195 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-07T22:17:09Z |
| publishDate | 2024-01-01 |
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| series | Photonics |
| spelling | doaj.art-92ed2220268b47a5b9cd8175ac3a71952024-02-23T15:31:35ZengMDPI AGPhotonics2304-67322024-01-0111211410.3390/photonics11020114Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision CorrectionHelen Amann0Samuel Arba Mosquera1Independent Researcher, 69117 Heidelberg, GermanySCHWIND eye-tech-solutions, 63801 Kleinostheim, GermanyThe aim of this work is to implement an algorithm that simulates a simplified cutting surface based on laser-induced optical breakdown (LIOB). The algorithm includes the definition of a possible positioning of the laser pulses and calculation of the roughness for different parameter settings (including LIOB threshold, pulse energies, and spot spacings) as the difference between simulated and ideal target cut (local differences within the cut, i.e., the waviness of the simulated cut vs. the homogeneity of the ideal target cut). Furthermore, optimizations of specific variables, such as spot distance (along the pathway), track distance (between lines/tracks), and pulse energy, are performed. The simulations suggest that lower pulse energies (well above the LIOB threshold) combined with asymmetric spacings (spot-to-track distance ratio >> 1) may be effective to lower the roughness of laser cuts generated by LIOB processes. The importance of lowering pulse energies (well above the threshold) emphasizes the need for the LIOB threshold to remain low (as low as possible). Reducing roughness by decreasing spacings (thus, increasing dose for same pulse energies) may have negative implications in visual recovery (risk for overdose). In all cases, the roughness is multiple times larger (rougher) than equivalent simulations for ablative procedures.https://www.mdpi.com/2304-6732/11/2/114ophthalmologyrefractive surgeryfemtosecond laserroughnesslaser induced optical breakdowncornea |
| spellingShingle | Helen Amann Samuel Arba Mosquera Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction Photonics ophthalmology refractive surgery femtosecond laser roughness laser induced optical breakdown cornea |
| title | Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction |
| title_full | Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction |
| title_fullStr | Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction |
| title_full_unstemmed | Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction |
| title_short | Optimization of the Spot Spacings for Reducing Roughness in Laser-Induced Optical Breakdown Processes for Corneal Laser Vision Correction |
| title_sort | optimization of the spot spacings for reducing roughness in laser induced optical breakdown processes for corneal laser vision correction |
| topic | ophthalmology refractive surgery femtosecond laser roughness laser induced optical breakdown cornea |
| url | https://www.mdpi.com/2304-6732/11/2/114 |
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