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Abstract
Purpose
To investigate the correlations of keratometry and corneal high order aberrations (HOAs) between the Keratron Scout videokeratoscope and the Pentacam HR Scheimpflug camera.
Methods
From December 2012 to February 2013, keratometry and corneal HOAs were determined using the Keratron Scout videokeratoscope and Pentacam HR Scheimpflug camera in 23 healthy individuals (46 eyes).
Results
Average keratometry showed high correlation with 95% confidence interval −0.155 ± 0.37 between the Keratron Scout and Pentacam HR. When comparing HOAs of the Keratron Scout and total corneal HOAs of Pentacam HR, total root-meansquare (RMS), and spherical aberration were positively correlated between the 2 devices (r = 0.67, p < 0.001 and r = 0.74, p < 0.001, respectively). When comparing HOAs of Keratron Scout and anterior corneal HOAs of Pentacam HR, total RMS, spherical aberration and coma were positively correlated between the 2 devices (r = 0.62, p < 0.001, r = 0.81, p < 0.001, and r = 0.52, p = 0.047, respectively).
References
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Figure 1.
The comparison of average keratometry (K) between the Keratron Scout videokeratoscopy and Pentacam HR Scheimpflug Camera. The solid line represents ±0.37 standard deviation confidence interval (CI) (i.e. 95% of the points should fall within these lines).
Figure 2.
The correlation between corneal higher order aberrations (HOAs) of the Keratron Scout videokeratoscopy and total corneal HOAs of Pentacam HR Scheimpflug Camera. RMS = root-mean-square; SA = spherical aberration.
Figure 3.
The correlation between corneal higher order aberrations (HOAs) of Keratron Scout videokeratoscopy and anterior corneal HOAs of Pentacam HR Scheimpflug Camera. RMS = root-mean-square; SA = spherical aberration.
Table 1.
Demographics of 23 patients (M:F = 8:15)
| Values | |
|---|---|
| Age (years) | 24.4 ± 4.24 |
| UCVA (log MAR) | 0.16 ± 0.08 |
| BCVA (log MAR) | 0.92 ± 0.09 |
| Sphere (diopter) | −3.76 ± 1.54 |
| Cylinder (diopter) | −1.48 ± 0.86 |
Table 2.
The comparison of cornea higher order aberrations (HOAs) between the Keratron Scout videokeratoscopy and Pentacam HR Scheimpflug Camera
Table 3.
The correlation of cornea higher order aberrations (HOAs) between the Keratron Scout videokeratoscopy and Pentacam HR Scheimpflug Camera
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