Refractive Error Prediction After Phacoemulsification Surgery: Lenstar LS 900 Versus Nidek AL-Scan.

IF 2.9 3区医学 Q1 OPHTHALMOLOGY

Journal of refractive surgery Pub Date : 2025-03-01 DOI:10.3928/1081597X-20250207-03

Gülay Yalçinkaya Çakir, Ahmet Kirgiz, Ibrahim Uzar, Nilay Kandemir Beşek, Sibel Ahmet, Burcu Kemer Atik, Seda Liman Uzun, Muhittin Taşkapili

{"title":"Refractive Error Prediction After Phacoemulsification Surgery: Lenstar LS 900 Versus Nidek AL-Scan.","authors":"Gülay Yalçinkaya Çakir, Ahmet Kirgiz, Ibrahim Uzar, Nilay Kandemir Beşek, Sibel Ahmet, Burcu Kemer Atik, Seda Liman Uzun, Muhittin Taşkapili","doi":"10.3928/1081597X-20250207-03","DOIUrl":null,"url":null,"abstract":"Purpose: To compare the Lenstar LS 900 (Haag-Streit AG) and the Nidek AL-Scan (Nidek Co) optical biometry devices in intraocular lens (IOL) calculation and refractive error prediction in cases with uncomplicated phacoemulsification surgery.Methods: In this study, axial length (AL), flat (K1), and steep (K2) axis, and the average (K-avg) keratometry values measured with the Lenstar LS 900 and the Nidek AL-Scan in patients who underwent uncomplicated phacoemulsification and the mean absolute error (MAE) of both devices were compared.Results: One hundred five eyes of 105 patients were examined. AL was measured shorter with the Lenstar LS 900 than with the Nidek AL-Scan, and K1, K2, and K-avg were measured steeper (P < .001 for all). Although there was no proportional bias in the AL, K1, and K-avg measurements of the Lenstar LS 900 and the Nidek AL-Scan devices (P = .83, .96, and .41 respectively), there was a proportional bias in the K2 measurements (P < .001, R2 = 0.128). MAE was significantly higher in the Lenstar LS 900 (0.74 ± 0.6 D) than in the Nidek AL-Scan (0.64 ± 0.60 D) (P < .001). The percentage of eyes with a prediction error within the range of ±0.50 D was significantly higher with the Nidek AL-Scan (61%) than with the Lenstar LS 900 (49.5%) (P = .008).Conclusions: The Nidek AL-Scan produced more predictable outcomes than the Lenstar LS 900 in selecting IOL power. Despite the clinical similarity between AL, K1, and K-avg readings, there may be notable differences in choosing the IOL power between these two devices. [J Refract Surg. 2025;41(3):e257-e263.].","PeriodicalId":16951,"journal":{"name":"Journal of refractive surgery","volume":"41 3","pages":"e257-e263"},"PeriodicalIF":2.9000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of refractive surgery","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.3928/1081597X-20250207-03","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose: To compare the Lenstar LS 900 (Haag-Streit AG) and the Nidek AL-Scan (Nidek Co) optical biometry devices in intraocular lens (IOL) calculation and refractive error prediction in cases with uncomplicated phacoemulsification surgery.

Methods: In this study, axial length (AL), flat (K1), and steep (K2) axis, and the average (K-avg) keratometry values measured with the Lenstar LS 900 and the Nidek AL-Scan in patients who underwent uncomplicated phacoemulsification and the mean absolute error (MAE) of both devices were compared.

Results: One hundred five eyes of 105 patients were examined. AL was measured shorter with the Lenstar LS 900 than with the Nidek AL-Scan, and K1, K2, and K-avg were measured steeper (P < .001 for all). Although there was no proportional bias in the AL, K1, and K-avg measurements of the Lenstar LS 900 and the Nidek AL-Scan devices (P = .83, .96, and .41 respectively), there was a proportional bias in the K2 measurements (P < .001, R² = 0.128). MAE was significantly higher in the Lenstar LS 900 (0.74 ± 0.6 D) than in the Nidek AL-Scan (0.64 ± 0.60 D) (P < .001). The percentage of eyes with a prediction error within the range of ±0.50 D was significantly higher with the Nidek AL-Scan (61%) than with the Lenstar LS 900 (49.5%) (P = .008).

Conclusions: The Nidek AL-Scan produced more predictable outcomes than the Lenstar LS 900 in selecting IOL power. Despite the clinical similarity between AL, K1, and K-avg readings, there may be notable differences in choosing the IOL power between these two devices. [J Refract Surg. 2025;41(3):e257-e263.].

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

$Journal of refractive surgery$

Journal of refractive surgery 医学-外科

CiteScore

5.10

自引率

12.50%

发文量

160

审稿时长

4-8 weeks

期刊介绍： The Journal of Refractive Surgery, the official journal of the International Society of Refractive Surgery, a partner of the American Academy of Ophthalmology, has been a monthly peer-reviewed forum for original research, review, and evaluation of refractive and lens-based surgical procedures for more than 30 years. Practical, clinically valuable articles provide readers with the most up-to-date information regarding advances in the field of refractive surgery. Begin to explore the Journal and all of its great benefits such as: • Columns including “Translational Science,” “Surgical Techniques,” and “Biomechanics” • Supplemental videos and materials available for many articles • Access to current articles, as well as several years of archived content • Articles posted online just 2 months after acceptance.