Repeatability data and agreement of keratometry with the VERION system compared to the lOLMaster

Gabor Nemeth, Eszter Szalai, Ziad Hassan, Agnes Lipecz, Andras Berta, Laszlo Modis

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PURPOSE: To analyze the repeatability of keratometric and white-to-white (WTW) distance measurements with the VERION Measurement Module (Alcon Laboratories, Inc., Fort Worth, TX) and to compare the measured data to the results of the lOLMaster (Carl Zeiss Meditec, Jena, Germany). METHODS: Three images were captured with the VERION and the flattest and steepest keratometric data, the astigmatism axis, and the WTW distance were recorded. Subsequently, the axial length, the keratometric data with axis, and the WTW distance were measured with an lOLMaster. The repeatability data of the keratometric value of the VERION System, converted to cross cylinder J0 and J45 vector components, were analyzed. The agreement data for keratometry obtained by the VERION System and the differences regarding keratometric data and WTW distance compared to lOLMaster were calculated. RESULTS: The measurements were conducted in 50 eyes of 50 healthy volunteers (median age: 50.32 years, range: 19.34 to 85.3 years). The flattest and the steepest keratometric data, the diopter of astigmatism, the J0 and J45 vector components, and WTW distance did not differ significantly between devices (P > .05). Intraclass correlation coefficients (range: 0.863 to 0.994) and Cronbach's alpha values (range: 0.950 to 0.998) were high for all parameters measured by the VERION System. CONCLUSIONS: The VERION System has high repeatability and agreement with the lOLMaster, making it suitable as an alternative tool in clinical practice.

Original languageEnglish
Pages (from-to)333-337
Number of pages5
JournalJournal of Refractive Surgery
Issue number5
Publication statusPublished - máj. 1 2015


ASJC Scopus subject areas

  • Surgery
  • Ophthalmology

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