Analysis of Corneal Distortion after Myopic PRK
The purpose of the study is to evaluate the corneal biomechanical properties (CBP) and their behaviors after myopic refractive surgery both with Ocular Response Analyzer (ORA) and Corvis ST (CST). This retrospective study included 145 eyes of 145 patients with a mean age of 33.13 ± 9.24 years, who u...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Journal of Clinical Medicine |
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| Online Access: | https://www.mdpi.com/2077-0383/10/1/82 |
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| author | Michele Lanza Luigi De Rosa Sandro Sbordone Rosa Boccia Ugo Antonello Gironi Carnevale Francesca Simonelli |
| author_facet | Michele Lanza Luigi De Rosa Sandro Sbordone Rosa Boccia Ugo Antonello Gironi Carnevale Francesca Simonelli |
| author_sort | Michele Lanza |
| collection | DOAJ |
| description | The purpose of the study is to evaluate the corneal biomechanical properties (CBP) and their behaviors after myopic refractive surgery both with Ocular Response Analyzer (ORA) and Corvis ST (CST). This retrospective study included 145 eyes of 145 patients with a mean age of 33.13 ± 9.24 years, who underwent myopic photorefractive keratectomy (PRK) for a refractive defect, measured as spherical equivalent, of mean −4.69 ± 2.04 D and have been evaluated before surgery and at 1, 3 and 6 months follow-up. Corneal hysteresis (CH) and corneal resistance factor (CRF) values significantly decreased after 1 month and remained statistically stable during further follow-ups. CST parameters had a different evolution: only second applanation time (AT2) differences showed a significant variation after 1 month that did not statistically change over time. Highest concavity deformation amplitude (HCDA), highest concavity peak distance (HCPD), first applanation time (AT1) and velocity (AV1) showed continuous significant differences both after 3 and after 6 months. This study suggests that after central surface ablation surgery, such as myopic PRK, corneal shape is remodeling, and its deformation parameters are going to change even at 6 months follow-up. This indicates that it should be important to evaluate refractive surgery patients during a longer follow-up because this could allow earlier diagnosis and better management of late-onset complications. |
| first_indexed | 2024-03-10T13:43:03Z |
| format | Article |
| id | doaj.art-da8e1708113b4baea73d6180e3f858c2 |
| institution | Directory Open Access Journal |
| issn | 2077-0383 |
| language | English |
| last_indexed | 2024-03-10T13:43:03Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Clinical Medicine |
| spelling | doaj.art-da8e1708113b4baea73d6180e3f858c22023-11-21T02:52:18ZengMDPI AGJournal of Clinical Medicine2077-03832020-12-011018210.3390/jcm10010082Analysis of Corneal Distortion after Myopic PRKMichele Lanza0Luigi De Rosa1Sandro Sbordone2Rosa Boccia3Ugo Antonello Gironi Carnevale4Francesca Simonelli5Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyMultidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyMultidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyMultidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyMultidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyMultidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, 80132 Napoli, ItalyThe purpose of the study is to evaluate the corneal biomechanical properties (CBP) and their behaviors after myopic refractive surgery both with Ocular Response Analyzer (ORA) and Corvis ST (CST). This retrospective study included 145 eyes of 145 patients with a mean age of 33.13 ± 9.24 years, who underwent myopic photorefractive keratectomy (PRK) for a refractive defect, measured as spherical equivalent, of mean −4.69 ± 2.04 D and have been evaluated before surgery and at 1, 3 and 6 months follow-up. Corneal hysteresis (CH) and corneal resistance factor (CRF) values significantly decreased after 1 month and remained statistically stable during further follow-ups. CST parameters had a different evolution: only second applanation time (AT2) differences showed a significant variation after 1 month that did not statistically change over time. Highest concavity deformation amplitude (HCDA), highest concavity peak distance (HCPD), first applanation time (AT1) and velocity (AV1) showed continuous significant differences both after 3 and after 6 months. This study suggests that after central surface ablation surgery, such as myopic PRK, corneal shape is remodeling, and its deformation parameters are going to change even at 6 months follow-up. This indicates that it should be important to evaluate refractive surgery patients during a longer follow-up because this could allow earlier diagnosis and better management of late-onset complications.https://www.mdpi.com/2077-0383/10/1/82myopic PRKcorneal deformationcorneal biomechanical propertiesORACorvis ST |
| spellingShingle | Michele Lanza Luigi De Rosa Sandro Sbordone Rosa Boccia Ugo Antonello Gironi Carnevale Francesca Simonelli Analysis of Corneal Distortion after Myopic PRK Journal of Clinical Medicine myopic PRK corneal deformation corneal biomechanical properties ORA Corvis ST |
| title | Analysis of Corneal Distortion after Myopic PRK |
| title_full | Analysis of Corneal Distortion after Myopic PRK |
| title_fullStr | Analysis of Corneal Distortion after Myopic PRK |
| title_full_unstemmed | Analysis of Corneal Distortion after Myopic PRK |
| title_short | Analysis of Corneal Distortion after Myopic PRK |
| title_sort | analysis of corneal distortion after myopic prk |
| topic | myopic PRK corneal deformation corneal biomechanical properties ORA Corvis ST |
| url | https://www.mdpi.com/2077-0383/10/1/82 |
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