|
KMID : 0360220120530050618
|
|
Journal of the Korean Ophthalmological Society
2012 Volume.53 No. 5 p.618 ~ p.625
|
|
|
Comparison of Corneal Curvatures Obtained with Different Devices
|
|
Kim So-Yoon
Chung Sung-Kun
|
|
|
Abstract
|
|
|
Purpose: To evaluate device efficacy using the corneal curvature value.
Methods: Prospectively, 35 patients (70 eyes) were enrolled in the present study. Three sets of corneal curvature values were obtained using the autorefractor (RK-F1ⓡ), manual keratometer (OM-2ⓡ), partial coherence interferometry keratometer (IOL Masterⓡ), wavefront analyzer (KR-1Wⓡ), and videokeratography (Orbscan IIⓡ). Repeatability of each device was evaluated by coefficient of variation, standard deviation, and intraclass correlation coefficient. RM-ANOVA on ranks was used to compare the differences in corneal curvatures among the devices. The Bland-Altman plot was performed to assess measurement agreement among the devices.
Results: The coefficient of variation values from each device ranged from 2.92% (IOL masterⓡ) to 3.06% (Orbscan IIⓡ), and the values of intraclass correlation coefficient ranged from 0.965 (KR-1Wⓡ) to 0.997 (IOL masterⓡ). Compared with the manual keratometer, there was a maximum corneal curvature difference of 1.23 D in KR-1Wⓡ, while the other devices had differences less than 0.82 D.
Conclusions: When assessing corneal curvature, the repeatability values were similar among the 5 devices, although a difference greater than 1 D was observed when comparing the KR-1Wⓡ to the manual keratometer.
|
|
|
KEYWORD
|
|
|
Corneal curvature, Keratometry
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
  
|
|