Biomechanical changes following corneal crosslinking in keratoconus patients
Purpose: To evaluate the biomechanical and tomographic outcomes of keratoconus patients up to four years after corneal crosslinking (CXL). Methods: In this longitudinal retrospective-prospective single-center case series, the preoperative tomographic and biomechanical results from 200 keratoconus ey...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 June 2024
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| In: |
Graefe's archive for clinical and experimental ophthalmology
Year: 2024, Jahrgang: 262, Heft: 11, Pages: 3635-3642 |
| ISSN: | 1435-702X |
| DOI: | 10.1007/s00417-024-06549-z |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s00417-024-06549-z
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| Verfasserangaben: | Emilia Felter, Ramin Khoramnia, Maximilian Friedrich, Hyeck-Soo Son, Gerd U. Auffarth, Victor A. Augustin |
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| 245 | 1 | 0 | |a Biomechanical changes following corneal crosslinking in keratoconus patients |c Emilia Felter, Ramin Khoramnia, Maximilian Friedrich, Hyeck-Soo Son, Gerd U. Auffarth, Victor A. Augustin |
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| 520 | |a Purpose: To evaluate the biomechanical and tomographic outcomes of keratoconus patients up to four years after corneal crosslinking (CXL). Methods: In this longitudinal retrospective-prospective single-center case series, the preoperative tomographic and biomechanical results from 200 keratoconus eyes of 161 patients undergoing CXL were compared to follow-up examinations at three-months, six-months, one-year, two-years, three-years, and four-years after CXL. Primary outcomes included the Corvis Biomechanical Factor (CBiF) and five biomechanical response parameters obtained from the Corvis ST. Tomographically, the Belin-Ambrósio deviation index (BAD-D) and the maximal keratometry (Kmax) measured by the Pentacam were analyzed. Additionally, Corvis E-staging, the thinnest corneal thickness (TCT), and the best-corrected visual acuity (BCVA) were obtained. Primary outcomes were compared using a paired t-test. Results: The CBiF decreased significantly at the six-month (p < 0.001) and one-year (p < 0.001) follow-ups when compared to preoperative values. E-staging behaved accordingly to the CBiF. Within the two- to four-year follow-ups, the biomechanical outcomes showed no significant differences when compared to preoperative. Tomographically, the BAD-D increased significantly during the first year after CXL with a maximum at six-months (p < 0.001), while Kmax decreased significantly (p < 0.001) and continuously up to four years after CXL. The TCT was lower at all postoperative follow-up visits compared to preoperative, and the BCVA improved. Conclusion: In the first year after CXL, there was a temporary progression in both the biomechanical CBiF and E-staging, as well as in the tomographic analysis. CXL contributes to the stabilization of both the tomographic and biomechanical properties of the cornea up to four years postoperatively. | ||
| 650 | 4 | |a Biomechanical analysis | |
| 650 | 4 | |a Cornea | |
| 650 | 4 | |a Corvis ST | |
| 650 | 4 | |a Crosslinking | |
| 650 | 4 | |a Keratoconus | |
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