Agreement between swept-source OCT-based and Scheimpflug-based optical biometers in myopic children

Area of Science:

• Ophthalmology
• Biomedical Optics
• Pediatric Optometry

Background:

• Accurate biometric measurements are crucial for managing myopia in children.
• Comparing different optical biometer technologies is essential for clinical consistency.

Purpose of the Study:

• To evaluate the agreement between SS-OCT-based (IOL Master 700) and Scheimpflug-based (Pentacam AXL) optical biometers.
• To assess measurements of axial length, anterior chamber parameters, and total cornea power in myopic children.

Main Methods:

• 175 myopic children were enrolled.
• Axial length, keratometry, anterior chamber depth, corneal diameter, and thickness were measured.
• Intraclass correlation coefficients, Bland-Altman plots, and astigmatism vector analysis were used.

Main Results:

• Satisfactory agreement was found for axial length, anterior chamber depth, and central corneal thickness.
• Clinically significant differences were observed in corneal diameter, posterior keratometry, and total cornea power.
• Discrepancies in keratometry and astigmatism measurements between devices were noted.

Conclusions:

• SS-OCT-based and Scheimpflug-based biometers show significant differences in key corneal parameters.
• The devices are not interchangeable for monitoring myopic children.
• Consistent use of a single device type is recommended for longitudinal follow-up.