Korean J Ophthalmol.  2018 Aug;32(4):257-264. 10.3341/kjo.2017.0091.

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices

• Cho YJ
• Lim TH
• Choi KY
• Cho BJ

• KMID: 2418145
• DOI: http://doi.org/10.3341/kjo.2017.0091

Abstract

PURPOSE
To evaluate the agreement between optical biometry with swept-source optical coherence tomography-based optical biometry (IOLMaster 700) and other devices.
METHODS
A total of 137 eyes (78 patients) with cataracts were included in this retrospective study. Axial length (AL), anterior chamber depth (ACD), keratometry, and white-to-white (WTW) distance measured using IOLMaster 700 were compared with results for the following five different biometers: IOLMaster 500, A-scan, automated refractor, manual keratometry, and Galilei G4. Differences and correlations among the devices were assessed using the Bland-Altman plot and intraclass correlation coefficient (ICC).
RESULTS
For AL values, the IOLMaster 700, IOLMaster 500, and A-scan measurements showed excellent agreement (all ICC >0.99). For ACD values, ICC of IOLMaster 700 and Galilei G4 was 0.965 but A-scan was poorly correlated with either IOLMaster 700 or Galilei G4. The ICCs of IOLMaster 700 and other devices were all greater than 0.9 for average keratometry, but those of the mean cylinder keratometry were all between 0.7 and 0.8. The mean difference in the WTW distance between the IOLMaster 700 and Galilei G4 was 0.029 mm, but the ICC was 0.525. AL measurements were not possible for 10 eyes with the IOLMaster 500 but were obtained in all eyes with the IOLMaster 700.
CONCLUSIONS
In clinical practice, AL, ACD, and average keratometry values of IOLMaster 700 can be used interchangeably with those of the other devices tested. However, the ACD value between IOLMaster 700 and A-scan or the WTW distance between IOLMaster 700 and Galilei G4 are not interchangeable because of clinical and statistical differences in measurements between the devices.

Keyword

Anterior segment biometry; Cataract; IOLMaster 700; Swept-source optical coherence tomography-based biometry

MeSH Terms

Anterior Chamber
Biometry*
Cataract
Cimetidine*
Retrospective Studies
Cimetidine

Figure

• 

  Fig. 1 Bland-Altman plot showing agreements in axial length (mm) measurements. (A) IOLMaster 700 and IOLMaster 500, (B) IOLMaster 700 and A-scan, and (C) IOLMaster 500 and A-scan. The solid line represents the mean difference and the dotted lines represent the 95% limits of agreement.

• 

  Fig. 2 Bland-Altman plot showing the agreements in anterior chamber depth (mm) measurements. (A) IOLMaster 700 and Galilei G4, (B) IOLMaster 700 and A-scan, and (C) Galilei G4 and A-scan. The solid line represents the mean difference and the dotted lines represent the 95% limits of agreement.

• 

  Fig. 3 Bland-Altman plots of the agreements in mean keratometry (diopter) measurements. (A) IOLMaster 700 and IOLMaster 500, (B) IOLMaster 700 and Galilei G4, (C) IOLMaster 700 and automated refractor, and (D) IOLMaster 700 and manual keratometry. The solid line represents the mean difference and the dotted lines represent the 95% limits of agreement.

• 

  Fig. 4 Bland-Altman plots of the agreements in mean cylinder power (diopter) measurements. (A) IOLMaster 700 and IOLMaster 500, (B) IOLMaster 700 and Galilei G4, (C) IOLMaster 700 and automated refractor, and (D) IOLMaster 700 and manual keratometry. The solid line represents the mean difference and the dotted lines represent the 95% limits of agreement.

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