Posters

A comparative study to assess three biometric measurements in different axial length

Poster Details

First Author: B.Chen CHINA

Co Author(s): X. Li   B. Chen   H. Li   Y. Xu           

Abstract Details

Purpose:

To assess the level of agreement among the OA-2000 (Tomey, Nagoya，Japan), and the Lenstar LS900 (Haag-Streit, Koeniz，Switzerland) and the IOLMaster500 (Carl Zeiss Meditec, Jena, Germany) in different axial length. To give a helpful reference to eye doctors for clinic studies.

Setting:

This prospective clinical study was conducted in the Wuhan Aier Eye Hospital between October 2017 to May 2018.

Methods:

Four hundred and seventy-nine patients (479eyes) were measured by Lenstar LS900, IOLMaster500 and OA2000. They were divided into four groups according to axial length (AL): short: AL≦22mm (55 eyes), normal: 22mm28.5mm (67 eyes). Ocular biometric parameters, including the anterior chamber depth (ACD), AL, keratometry (K): keratometry for the flattest meridian(Kf)，keratometry for the steepest meridian(Ks) were obtained. Heterogeneity among devices was assessed by the ANOVA statistic. Bland-Altman plots were used to assess agreement among the instruments.

Results:

The mean values of the AL, ACD, Kf, Ks differed very little and the differences were not significant regardless of the group (all, p>0.05). As for AL, the agreement were good; 95% LoA of ACD obtained from the OA2000 and the Lenstar LS900 were 0.32mm，0.41mm，0.29mm，0.11mm respectively, and the consistency was good especially in the extremely long eye group. However, the high percentage of 95% LoA of K greater than 1D in the most groups is noteworthy.

Conclusions:

In clinical practice, the IOLMaster500, the Lenstar LS900 and the OA2000 can be used interchangeably for AL measurement. The Lenstar LS900 and the OA2000 agree regarding ACD measurements especially for the extremely long eye group. As to K, however, they are not interchangeable in clinical uses.

Financial Disclosure:

None