Comparison of the VISX WaveScan and OPD-ScanⅢwith the subjective refraction
10.3980/j.issn.1672-5123.2014.10.31
- VernacularTitle:VISX WaveScan 和 OPD-Scan Ⅲ与主觉验光结果的比较
- Author:
Ran, ZHU
;
Ke-Li, LONG
;
Xiu-Mei, WU
;
Quan-De, LI
- Publication Type:Journal Article
- Keywords:
WaveScan;
OPD-ScanⅢ;
subjective refraction
- From:
International Eye Science
2014;(10):1849-1851
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To compare the refractive errors measured by the VISX WaveScan, OPD - Scan Ⅲ and the subjective refraction.
METHODS: Seventy - six patients ( 152 eyes ) were recruited from January 2013 to December 2013. All patients were measured with subjective refraction by the phoropter (NIDEK, RT-5100), objective refraction by the WaveScan ( AMO Company, USA) , OPD-ScanⅢ ( Nidek Technologies, Japan). The sphere, cylinder, axis of the three methods were compared and analyzed.
RESULTS: The sphere measured by WaveScan was lower than that by subjective refraction, the difference was 0. 13±0. 30D (t=3. 753, P<0. 001). For cylinder, the difference was 0. 13±0. 43D (t=3. 664, P<0. 001). There was no significance for sphere, cylinder, and spherical equivalent between OPD - Scan Ⅲ and subjective refraction (P>0. 05). The value of the difference between WaveScan and subjective refraction was 5. 87o±6. 19o for the axis and the difference between OPD-Scan Ⅲ and subjective refraction was 3. 82o±3. 95o. There was statistic significance (t=2. 817, P=0. 006).
CONCLUSION: For sphere and cylinder, WaveScan generated some deviation relative to subjective refraction. The Nidek OPD-ScanⅢ gives more accurate measures of objective refraction when compared with subjective refraction.
