Comparative analysis of measurements of the anterior segment and the axial length parameters of the eyeball obtained with optical and ultrasound technique

ABSTRACT

Purpose

To compare anterior chamber depth (ACD), keratometry (K1, K2), central corneal thickness (CCT), and axial length (AL) measured by four different devices.

Material and methods

150 eyes qualified for cataract surgery were included in the study. Four devices: IOL Master 500, OCT CASIA2, Dual Scheimpflug Analyzer Galilei G6, and Quantel Compact Touch ultrasound biometer, were compared. The agreement of measurements between the devices was evaluated by the Bland-Altman method.

Results

ACD was significantly different for Ultrasound and IOL Master 3 ± 0.33 3.12 ± 0.42 respectively Interclass correlation ecoefficiency (ICC):0.69 (95% confidence interval (CI): 0.62; 0.76) p < 0.001. A significant difference was observed between Casia and IOL while measuring K1, 43.5 ± 1.7 vs. 43.61 ± 1.56 ICC:0.84 (95%CI: 0.79; 0.87) and ACD parameters 2.65 ± 0.45 vs. 3.12 ± 0.42 ICC 0.68 (95%: 0.6; 0.75) and K2 42.51 ± 1.62 vs. 44.57 ± 1.59 ICC; 0.83 (95%CI:0.78; 0.87) p < 0.001. Similarly, measurements obtained by Casia, and Galilei were also different K1 43.5 ± 1.7 ICC:0.7 (95%CI:0.62; 0.76), CCT 546.35 ± 34.75 vs. 566.73 ± 37.92 ICC:0.88 (95%CI:0.84; 0.9) p < 0.001. Differences between Galilei and IOL master were not significant p values from 0.175 to 0.999 ICC 0.8 (95%CI:0.75; 0.85) to ICC 0.94 (95%CI:0.92; 0.95).

Conclusions

The measurements obtained from Casia, and Ultrasound were significantly different and not interchangeable except for IOL master and Galilei.

KEYWORDS:

• Keratometry
• axial length
• anterior chamber depth
• central corneal thickness
• IOL master 500
• ss-OCT casia 2
• dual scheimpflug analyzer galilei G6
• quantel compact touch a-scan ultrasound biometer
• cataract surgery

Declaration of Interest

A Wylegala has received grants from Optopol Technology. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

Reviewer disclosures

Peer reviewers on this manuscript have no relevant financial or other relationships to disclose.

Additional information

Funding

This paper was not funded.