Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium.

Rigendinger, Fritz; Aebersold, Daniel; Cvejic, Zeljka; Pajic, Bojan (2021). Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium. Sensors, 21(3) Molecular Diversity Preservation International MDPI 10.3390/s21030975

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Clinic of Radiation Oncology

UniBE Contributor:

Aebersold, Daniel and Pajic, Bojan

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1424-8220

Publisher:

Molecular Diversity Preservation International MDPI

Language:

English

Submitter:

Beatrice Scheidegger

Date Deposited:

17 Feb 2021 08:34

Last Modified:

17 Feb 2021 08:43

Publisher DOI:

10.3390/s21030975

PubMed ID:

33540506

Uncontrolled Keywords:

beta irradiation corneal aberrations pterygium

BORIS DOI:

10.48350/152234

URI:

https://boris.unibe.ch/id/eprint/152234

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