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Evaluation of orbital soft tissue biomechanical parameters in patients with thyroid eye disease using the non-contact Corvis ST

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Abstract

Introduction

In thyroid eye disease (TED), all ocular components and adnexa such as extraocular muscles, orbital adipose tissues, eyelids, and tear glands could be affected. This study aimed to study the orbital biomechanical parameters in patients with TED, in terms of differences with healthy individuals and correlation with clinical findings, using Corvis ST (CST, Oculus Wetzlar).

Materials and methods

In this study, 26 consecutive patients with TED were recruited. Demographic data were collected, and patients with TED were assessed for exophthalmos, intraocular pressure, and clinical activity score. Biomechanical response parameters of one randomly-chosen eye of each patient, including whole eye movement length (WEMl) and time (WEMt), were evaluated by the CST, and data were compared between patients and age- and gender-matched healthy controls.

Results

The mean age was 39.88 ± 11.61 years old for patients with TED and 34.38 ± 8.57 years old for the healthy subjects. Nine out of 26 patients with TED and nine of 26 healthy individuals were male. The median duration of thyroid disease was 36 (IQR 54) months and the median duration of thyroid ophthalmopathy was 27 (IQR 27) months. Four out of 26 patients (7.7%) had active disease. The mean WEMl was 206.15 ± 61.58 µm in the TED group and 254.23 ± 64.01 μm in the healthy group, the difference of which was statistically significant (p = 0.008). The median of WEMt was 20.90 (1.15) msec in the TED group and 21.45 (0.93) msec in the healthy group (p < 0.001). Also, the mean of WEMl and WEMt were lower in patients with active disease compared to patients with quiescent disease.

Conclusion

The CST-derived WEMl was significantly smaller in patients with thyroid eye disease compared to normal subjects. The WEMl and WEMt were relatively shorter in the patients with active TED compared to the patients with quiescent TED, although small numbers of patients with active TED limits took a statistically significant conclusion. WEMl and WEMt might be useful in evaluating the compliance of the orbit in patients with TED.

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Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors and Affiliations

  1. Medical Faculty, Mashhad University of Medical Sciences, Mashhad, Iran

    Arman Moeen Rad

  2. Eye Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

    Siamak Zarei-Ghanavati, Aliakbar Sabermoghaddam, Seyed Hosein Ghavami Shahri, Elham Bakhtiari & Mohammad Yaser Kiarudi

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  1. Arman Moeen Rad
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  2. Siamak Zarei-Ghanavati
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  4. Seyed Hosein Ghavami Shahri
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Contributions

All authors contributed to the study conception and design. Study conception and design was done by [SZ-G, MYK, SHGS]. Material preparation, data collection and analysis were performed by [MYK, AMR], and [ ASM]. The first draft of the manuscript was written by [EB] and all authors commented on the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Mohammad Yaser Kiarudi.

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Conflict of interest

The authors have no relevant financial or non-financial interests to disclose.

Ethical approval

This study was performed in line with the principles of the Declaration of Helsinki. The study protocol was approved by the Ethics Committee of Mashhad University of Medical Sciences.

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Informed consent was obtained from all individual participants included in the study.

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Moeen Rad, A., Zarei-Ghanavati, S., Sabermoghaddam, A. et al. Evaluation of orbital soft tissue biomechanical parameters in patients with thyroid eye disease using the non-contact Corvis ST. Int Ophthalmol 43, 3615–3621 (2023). https://doi.org/10.1007/s10792-023-02770-7

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  • DOI: https://doi.org/10.1007/s10792-023-02770-7

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