Axial Length Measurement Failure Rates with the IOLMaster and Lenstar LS 900 in Eyes with Cataract

Colm McAlinden; Qinmei Wang; Konrad Pesudovs; Xin Yang; Fangjun Bao; Ayong Yu; Shishi Lin; Yifan Feng; Jinhai Huang

doi:10.1371/journal.pone.0128929

Axial Length Measurement Failure Rates with the IOLMaster and Lenstar LS 900 in Eyes with Cataract

PLoS One. 2015 Jun 10;10(6):e0128929. doi: 10.1371/journal.pone.0128929. eCollection 2015.

Authors

Colm McAlinden¹, Qinmei Wang², Konrad Pesudovs³, Xin Yang⁴, Fangjun Bao², Ayong Yu², Shishi Lin⁴, Yifan Feng⁴, Jinhai Huang²

Affiliations

¹ School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China; Flinders University, Adelaide, South Australia, Australia.
² School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China; Key Laboratory of Vision Science, Ministry of Health P.R. China, Wenzhou, Zhejiang, China.
³ Flinders University, Adelaide, South Australia, Australia.
⁴ School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.

Abstract

Purpose: To evaluate axial length (AL) measurement failure rate with the IOLMaster (Carl Zeiss AG, Germany) and Lenstar LS 900 (Haag-Streit AG, Switzerland) in eyes with cataract.

Methods: Two hundred and ninety-six eyes of 170 patients with cataract were enrolled. Cataract type and severity were graded using the Lens Opacities Classification System III (LOCS III) and AL measurements were attempted with IOLMaster (version 5.4) and Lenstar LS 900 (version 1.1). Chi-squared analysis was used to assess if the difference in AL measurement acquisition rate was statistically significant between the two devices. The association of the different cataract types and severity with the AL measurement acquisition rate was evaluated with logistic regression analysis.

Results: AL measurements were obtained in 184 eyes (62.16%) using the IOLMaster and 191 eyes (64.53%) using the Lenstar, which corresponds to a failure rate of 37.84% and 35.47% respectively. Chi-square analysis indicated no significant difference between the Lenstar and IOLMaster for AL measurement failure rate (x2 = 0.356, P = 0.550). Logistic regression analysis indicated no association between acquisition rates and cortical or nuclear cataracts with either device. There was a statistically significant association between acquisition rates and increasing severity of posterior subcapsular cataracts with the IOLMaster (β = -1.491, P<0.001) and Lenstar LS 900 (β = -1.507, P<0.001).

Conclusion: The IOLMaster and Lenstar LS 900 have similar AL measurement failure rates (35-38%) for Chinese public hospital cataract patients. Increasing severity of posterior subcapsular cataracts was problematic for both devices.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cataract / pathology*
Humans
Lenses, Intraocular
Prospective Studies

Grants and funding

Supported in part by the Natural Science Foundation of China (81300807); Foundation of Wenzhou City Science & Technology Bureau (J20140014, Y20140705, Y20140159; www.wzkj.gov.cn); the National Science and Technology Ministry (2012BAI08B04); the health Bureau of Zhejiang Province (2012KYB135; www.zjmed.org.cn); and the Scientific Research Fund of Zhejiang Provincial Education Department (Y201223147; www.zjedu.gov.cn). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.