Study on the difference of A-scan and IOL Master in measuring intraocular lens power
10.3980/j.issn.1672-5123.2016.10.35
- VernacularTitle:A超和lOL Master测量人工晶状体度数的差异性研究
- Author:
Qian, ZHANG
;
Yue, HUANG
;
Jing-Ying, YE
;
Yan, ZHENG
- Publication Type:Journal Article
- Keywords:
Age-related cataract;
lntraocular Lens;
A-scan;
lOL Master
- From:
International Eye Science
2016;16(10):1924-1926
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To compare the difference of A-scan and lOL Master in intraocular lens power measurement.
●METHODS:Two hundred and twenty-six patients (230 eyes) with age-related cataract were included in the study. Before surgery, axial length was measured by A-scan and lOL Master respectively and corneal curvature was measured by auto refractometer. lntraocular lens power was calculated according to the SRK-T formula. Corneal curvature was measured by auto refractometer and the refractive outcome was performed by phoropter three months after cataract surgery.
●RESULTS:The mean axial length was (23. 48 ± 1. 94) mm measured by A-scan and (23. 75±1. 96) mm measured by lOL Master. There was significant difference between them ( P < 0. 05 ). After random grouping, the preoperative and postoperative mean corneal curvature in A-scan group was (43. 94±1. 81) D and (43. 98±1. 87) D respectively. There was no statistically significant difference between them (P>0. 05). And the results were (44. 10 ± 1. 57 ) D and ( 44. 11 ± 1. 58 ) D in lOL Master group. There was no significant difference between them (P>0. 05); The mean absolute refractive error (MAE) in A-scan group was ( 0. 47 ± 0. 27 ) D and in lOL Master group (0. 41±0. 19) D. The difference was significant (P<0. 05).
●CONCLUSION: lOL Master is proved to be slightly more accurate than A-scan for lOL power calculation.
