# Comparative Analysis of Keratometric and Pachymetry Values From Corneal Topography Scans: A Comparison Between Pentacam and Galilei

## TL;DR

This study compares corneal measurements from two devices, Pentacam and Galilei, to determine if they can be used interchangeably in clinical practice.

## Contribution

The study provides a direct comparison of corneal topography metrics between Pentacam and Galilei devices.

## Key findings

- Minimal differences were observed in K1, K2, and pachymetry values between the two devices.
- Statistically significant differences were found in Kmax and pachymetry, raising concerns about interchangeability.
- The study suggests cautious use of these devices interchangeably in clinical settings.

## Abstract

Objective

The objective of this study was to compare K1, K2, Kmax, and pachymetry values from Pentacam and Galilei scans of corneal topography in order to assess their correlation and interchangeability in clinical practice.

Methodology

A total of 34 patients (68 eyes) were enrolled in the study. Corneal topography was performed using Pentacam and Galilei devices on the same day. K1, K2, Kmax, and pachymetry readings were obtained from the scans and analyzed using paired t-tests and Bland-Altman plots.

Results

There were minimal differences in clinical settings between Pentacam and Galilei for K1, K2, Kmax (>0.75 D), and pachymetry values (>15 um). However, there was a statistically significant difference found between Kmax and pachymetry, making their interchangeability questionable.

Conclusion

Pentacam and Galilei demonstrate a good correlation between corneal keratometric values (K1, K2, and Kmax) and pachymetry values in clinical settings, and they should be used interchangeably with caution.