Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium
Background: It is known that pterygia above a certain size cause astigmatism and other aberrations of the human cornea and thus impair the quality of vision. Exclusive Sr-/Ytt-90 beta irradiation is a highly effective treatment for primary pterygia. The aim of this retrospective study is to determin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/3/975 |
| _version_ | 1797416751235858432 |
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| author | Fritz Rigendinger Daniel M. Aebersold Zeljka Cvejic Bojan Pajic |
| author_facet | Fritz Rigendinger Daniel M. Aebersold Zeljka Cvejic Bojan Pajic |
| author_sort | Fritz Rigendinger |
| collection | DOAJ |
| description | Background: It is known that pterygia above a certain size cause astigmatism and other aberrations of the human cornea and thus impair the quality of vision. Exclusive Sr-/Ytt-90 beta irradiation is a highly effective treatment for primary pterygia. The aim of this retrospective study is to determine the extent to which higher order corneal aberrations are affected by this treatment. Methods: Evaluation of corneal topographies and wavefront aberration data of 20 primary pterygia patients generated before and at different points in time in the first year after irradiation. Additionally, the size of the pterygium was measured. Results: The study showed a significant increase in coma and triple leaf aberrations in pterygia with a horizontal length of 2 mm and more. It was also found that a pterygium size greater than 2 mm significantly induces astigmatism. Both phenomena reduce visual quality. In none of the patients could a pterygium recurrence be detected after irradiation. Conclusions: If the pterygium size is less than 2 mm, early exclusive Sr/Ytt-90 beta irradiation can be recommended. If the size is more than 2 mm, a pterygium excision 6 months after beta irradiation can be discussed. |
| first_indexed | 2024-03-09T06:08:45Z |
| format | Article |
| id | doaj.art-c2648d7362494f4da2a93ada87927c0f |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T06:08:45Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c2648d7362494f4da2a93ada87927c0f2023-12-03T12:01:16ZengMDPI AGSensors1424-82202021-02-0121397510.3390/s21030975Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of PterygiumFritz Rigendinger0Daniel M. Aebersold1Zeljka Cvejic2Bojan Pajic3Eye Clinic Orasis, Swiss Eye Research Foundation, 5734 Reinach AG, SwitzerlandDepartment of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3012 Bern, SwitzerlandDepartment of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 4, 21000 Novi Sad, SerbiaEye Clinic Orasis, Swiss Eye Research Foundation, 5734 Reinach AG, SwitzerlandBackground: It is known that pterygia above a certain size cause astigmatism and other aberrations of the human cornea and thus impair the quality of vision. Exclusive Sr-/Ytt-90 beta irradiation is a highly effective treatment for primary pterygia. The aim of this retrospective study is to determine the extent to which higher order corneal aberrations are affected by this treatment. Methods: Evaluation of corneal topographies and wavefront aberration data of 20 primary pterygia patients generated before and at different points in time in the first year after irradiation. Additionally, the size of the pterygium was measured. Results: The study showed a significant increase in coma and triple leaf aberrations in pterygia with a horizontal length of 2 mm and more. It was also found that a pterygium size greater than 2 mm significantly induces astigmatism. Both phenomena reduce visual quality. In none of the patients could a pterygium recurrence be detected after irradiation. Conclusions: If the pterygium size is less than 2 mm, early exclusive Sr/Ytt-90 beta irradiation can be recommended. If the size is more than 2 mm, a pterygium excision 6 months after beta irradiation can be discussed.https://www.mdpi.com/1424-8220/21/3/975pterygiumbeta irradiationcorneal aberrations |
| spellingShingle | Fritz Rigendinger Daniel M. Aebersold Zeljka Cvejic Bojan Pajic Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium Sensors pterygium beta irradiation corneal aberrations |
| title | Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium |
| title_full | Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium |
| title_fullStr | Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium |
| title_full_unstemmed | Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium |
| title_short | Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium |
| title_sort | changes of corneal biomechanical properties upon exclusive ytt sr 90 irradiation of pterygium |
| topic | pterygium beta irradiation corneal aberrations |
| url | https://www.mdpi.com/1424-8220/21/3/975 |
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