Michael Lawless, Gerard Sutton, Tim Roberts,Colin Chan, David Ng, Simon Chen

Purpose: to compare the Verion system with current methods.

Methods:
262 eyes underwent preoperative assess-ment. Keratometry was achieved with Verion,Autokeratometry, IOLMaster and Pentacam (CCT)units. Bland-Altman plots were used to describe thedifference between meridian, magnitude and WTWvalues.

Results:
The mean bias between IOLMaster, Auto,CCT and Verion meridian values was ?1.93°, ?1.26°and ?2.77° respectively. The mean bias in magnitude between IOLMaster, Auto, CCT and Verion values was?0.10D, ?0.15 and ?0.04D respectively. The mean biasin average keratometry between IOLMaster, Auto,CCT and Verion values was 0.23D,0.45 and ?0.06D.

Conclusion:
Our data suggests values are similarbetween instruments, and Verion keratometry can beused for IOL selection. The scores appear to be consist-ent across a range of values.