Abstract
Purpose: To compare the biometric measurements obtained from the Verion Image-Guided System to those obtained by auto-refracto-keratometer in normal eyes. Methods: This is a prospective, observational, comparative study conducted at the Asociación para Evitar la Ceguera en México I.A.P., Mexico. Three sets of keratometry measurements were obtained using the image-guided system to assess the coefficient of variation, the within-subject standard deviation and intraclass correlation coefficient (ICC). A paired Student t test was used to assess statistical significance between the Verion and the auto-refracto-keratometer. A Pearson’s correlation coefficient (r) was obtained for all measurements, and the level of agreement was verified using Bland–Altman plots. Results: The right eyes of 73 patients were evaluated by each platform. The Verion coefficient of variation was 0.3% for the flat and steep keratometry, with the ICC being greater than 0.9 for all parameters measured. Paired t test showed statistically significant differences between groups (P = 0.0001). A good correlation was evidenced for keratometry values between platforms (r = 0.903, P = 0.0001 for K1, and r = 0.890, P = 0.0001). Bland–Altman plots showed a wide data spread for all variables. Conclusion: The image-guided system provided highly repeatable corneal power and keratometry measurements. However, significant differences were evidenced between the two platforms, and although values were highly correlated, they showed a wide data spread for all analysed variables; therefore, their interchangeable use for biometry assessment is not advisable.
Original language | English |
---|---|
Pages (from-to) | 951-957 |
Number of pages | 7 |
Journal | International Ophthalmology |
Volume | 38 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Jun 2018 |
Bibliographical note
Funding Information:Acknowledgement The Asociación Para Evitar la Ceguera en México I.A.P. provided financial support in the form of biometry assessment grant for enrolled subjects (Grant Number SA-16-00). The sponsor had no role in the design or conduct of this research.
Funding Information:
The Asociaci?n Para Evitar la Ceguera en M?xico I.A.P. provided financial support in the form of biometry assessment grant for enrolled subjects (Grant Number SA-16-00). The sponsor had no role in the design or conduct of this research. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers? bureaus; membership, employment, consultancies, stock ownership or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.
Publisher Copyright:
© 2017, Springer Science+Business Media Dordrecht.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Ophthalmology