The Effect of Cycloplegia on the Ocular Biometric and Anterior Segment Parameters: A Cross-Sectional Study

Momeni-Moghaddam, H. and Maddah, N. and Wolffsohn, J. S. and Etezad-Razavi, M. and Zarei-Ghanavati, S. and Akhavan Rezayat, A. and Moshirfar, M. (2019) The Effect of Cycloplegia on the Ocular Biometric and Anterior Segment Parameters: A Cross-Sectional Study. Ophthalmology and Therapy, 8 (3). pp. 387-395.

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Abstract

Introduction: To evaluate the effects of cycloplegia on the biometric components and anterior segment parameters of the eye. Methods: In this cross-sectional study, changes to axial length (AL), anterior chamber depth (ACD) lens thickness, anterior chamber angle (ACA) and volume, corneal thickness in the pupil center (PC), corneal curvature (CC) and white-to-white (WTW) following cycloplegia induced by tropicamide 1 in 42 eyes of patients aged 23–58 years were assessed. Biometric components and anterior segment parameters were measured using an IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany) and a Pentacam HR (Oculus Optikgeräte GmbH, Wetzlar, Germany), respectively. Results: Significant statistical changes in ACD (increased by 0.06 ± 0.05 mm; p < 0.001), anterior chamber volume (increased by 15.19 ± 10.32 mm3; p < 0.001), ACA (decreased by 2.18 ± 10.20°; p = 0.029) and lens thickness (decreased by 0.02 ± 0.03 mm; p < 0.001) were observed post-cycloplegia, while the changes in CC, corneal thickness in the PC, WTW and AL were not statistically different (p > 0.05). Also, a significant inferior displacement of the PC along the vertical axes was seen (p = 0.020). Conclusion: Cycloplegia resulted in a deeper ACD and thinner lens thickness. These changes should be considered in determining intraocular lens (IOL) power to prevent refractive surprises in cataract surgery and also in the phakic IOL implantation. © 2019, The Author(s).

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Moshirfar, M.; Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, School of Medicine, University of UtahUnited States; email: cornea2020@me.com
Uncontrolled Keywords: Anterior segment Biometry Crystalline lens Cycloplegia Ocular components tropicamide accommodation paralysis adult anterior eye chamber angle anterior eye chamber depth anterior eye segment Article cornea curvature cornea thickness cross-sectional study eye axis length human priority journal
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib1 lib1
Date Deposited: 21 Jun 2020 09:20
Last Modified: 21 Jun 2020 09:20
URI: http://eprints.mums.ac.ir/id/eprint/18534

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