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Corneal curvature measurements utilizing a new swept-source optical coherence tomography Tomey OA-2000® and comparison with IOLMaster® 500 in pterygium patients

Hilmi, Mohd Radzi and Mohd Kamal, Khairidzan and Che Azemin, Mohd Zulfaezal and Ithnin, Mohd. Hafidz and Md Mustafa, Md Muziman Syah and Yusof @ Alias, Firdaus and Ahmad, Norsham (2018) Corneal curvature measurements utilizing a new swept-source optical coherence tomography Tomey OA-2000® and comparison with IOLMaster® 500 in pterygium patients. Sains Medika: Jurnal Kedokteran dan Kesehatan, 9 (1). ISSN 2085-1545 E-ISSN 2339-093X

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Abstract

Introduction: Corneal curvature (CC) is an important anterior segment parameter. This study compared CC measurements conducted with two optical devices in pterygium eyes. Methods: Sixty pterygium eyes of 30 patients were enrolled in this study. CC was measured three times with the optical biometer and topography-keratometer Tomey OA-2000 (Tomey Corporation, Nagoya, Japan), then with partial optical coherence interferometry (PCI) IOL Master 500 (Carl Zeiss Meditec, Dublin, CA) and data were statistically analysed. Results: The measurements revealed in a mean CC of 43.86 ± 1.57 D with Tomey OA-2000 and 43.84 ± 1.55 D with IOL Master. Distribution of data is normal, and no significance difference in CC values was detected (P = 0.952) between the two devices. Correlation between CC measurements was highly significant (r = 0. 99; P < 0.0001). The mean difference of CC values between devices was 0.017 D and 95% limit of agreement was -0.088 to 0.12. Duration taken for measurements with the standard biometer IOL Master was longer (55.17 ± 2.24 seconds) than with Tomey OA-2000 (39.88 ± 2.38 seconds) in automatic mode. Duration of manual measurement with Tomey OA-2000 in manual mode was shorter (28.57 ± 2.71 seconds). Conclusion: In pterygium eyes, CC measured with Tomey OA-2000 and IOL Master showed similar values, and high correlation was observed between these two devices. This shows that both devices can be used interchangeably. Tomey OA-2000 is better in terms of faster to operate and has its own topography systems.

Item Type: Article (Journal)
Additional Information: 3389/68281
Uncontrolled Keywords: Pterygium; Corneal Curvature; IOL Master 500; Tomey OA-2000; Corneal Topography
Subjects: R Medicine > RE Ophthalmology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Allied Health Sciences > Department of Optometry and Visual Science
Kulliyyah of Medicine > Department of Ophthalmology
Depositing User: Dr Mohd Radzi Hilmi
Date Deposited: 28 Jan 2020 13:17
Last Modified: 26 Feb 2020 23:10
URI: http://irep.iium.edu.my/id/eprint/68281

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