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pubblicata il 23.10.2014

Huang, Jinhai, et al. "Comparison of anterior segment measurements with Scheimpflug/Placido photography-based topography system and IOLMaster partial coherence interferometry in patients with cataracts." Journal of ophthalmology 2014 (2014).


Author information: School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, 270 West Xueyuan Road, Wenzhou, Zhejiang 325027, China ; Key Laboratory of Vision Science, Ministry of Health, 270 West Xueyuan Road, Wenzhou, Zhejiang 325027, China. 2 School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, 270 West Xueyuan Road, Wenzhou, Zhejiang 325027, China. 3 Studio Oculistico d'Azeglio, Bologna, Italy.

PURPOSE:

To assess the consistency of anterior segment measurements obtained using a Sirius Scheimpflug/Placido photography-based topography system (CSO, Italy) and IOLMaster partial coherence interferometry (Carl Zeiss Meditec, Germany) in eyes with cataracts.

METHODS:

A total of 90 eyes of 90 patients were included in this prospective study. The anterior chamber depth (ACD), keratometry (K), corneal astigmatism axis, and white to white (WTW) values were randomly measured three times with Sirius and IOLMaster. Concordance between them was assessed by calculating 95% limits of agreement (LoA).

RESULTS:

The ACD and K taken with the Sirius were statistically significantly higher than that taken with the IOLMaster; however, the Sirius significantly underestimated the WTW values compared with the IOLMaster. Good agreement was found for Km and ACD measurements, with 95% LoA of -0.20 to 0.54 mm and -0.16 to 0.34 mm, respectively. Poor agreement was observed for astigmatism axis and WTW measurements, as the 95% LoA was -23.96 to 23.36° and -1.15 to 0.37 mm, respectively.

CONCLUSION:

With the exception of astigmatism axis and WTW, anterior segment measurements taken by Sirius and IOLMaster devices showed good agreement and may be used interchangeably in patients with cataracts.

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