215 470

Cited 17 times in

Comparison of Internal and Total Optical Aberrations for 2 Aberrometers: iTrace and OPD Scan

Authors
 Jung Bin Won  ;  Sun Woong Kim  ;  Eung Kweon Kim  ;  Byung Jin Ha  ;  Tae-im Kim 
Citation
 Korean Journal of Ophthalmology, Vol.22(4) : 210-213, 2008 
Journal Title
Korean Journal of Ophthalmology
ISSN
 1011-8942 
Issue Date
2008
MeSH
Adult ; Diagnostic Techniques, Ophthalmological/instrumentation* ; Humans ; Pupil/physiology ; Refractive Errors/diagnosis* ; Reproducibility of Results
Keywords
iTrace ; OPD scan ; Wavefront
Abstract
PURPOSE: To compare and evaluate the total and internal aberrations measured by two aberrometers: the laser ray tracing aberrometer (iTrace, Tracey Technology) and the automatic retinoscope aberrometer (OPD Scan, Nidek).

METHODS: A total of 54 healthy eyes were enrolled in the study. Following pupil dilation, aberrations were measured with the iTrace and OPD Scan. We compared the aberrations obtained from measurements obtained at pupillary diameters of 4 mm and 6 mm with the OPD Scan and iTrace. Aberrations of internal optics and total aberrations were compared for the two aberrometers. For each aberrometer and each eye, the averaged Zernike data were used to calculate various root-mean-square (RMS) data. These parameters, together with the refractive parameters, were then analyzed and complimented by paired t-tests.

RESULTS: At a pupil diameter of 4 mm, the number of total aberrations in the entire eye showed significant differences for the mean values of spherical aberrations (Z4,0) obtained with the OPD Scan and iTrace aberrometers (p=0.001). Aberrations of the internal optics showed significant differences in the mean values of total RMS, coma (Z3,-1), and trefoil (Z3,3) between the iTrace and OPD Scan (p<0.001, p=0.01, p<0.001) for the same pupil diameter of 4 mm. At a pupil diameter of 6 mm, the two instruments showed a similar number of total aberrations. Aberrations of the internal optics showed significant differences in the mean values of total RMS, spherical aberration (Z4,0), and coma (Z3,-1) between the two devices (p<0.001, p=0.01, p<0.001).

CONCLUSIONS: The iTrace and OPD Scan showed the largest number of differences for aberrations of internal optics rather than total aberrations for both pupil diameters. These results suggest that in healthy eyes, the two aberrometers may vary in some details. The aberrometers showed more agreement at a pupil diameter of 6 mm compared to 4 mm
Files in This Item:
T200805059.pdf Download
DOI
10.3341/kjo.2008.22.4.210
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Tae-Im(김태임) ORCID logo https://orcid.org/0000-0001-6414-3842
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/108332
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links