The new IOL master 700 has smaller in vivo repeatability SD for most metrics than the Lenstar, eg. 8µ instead of 35µ for AXL, 11µ instead of 40µ for ACD and 12µ instead of 80µ for lensthickness.
However, are these smaller standard deviations of clinical importance, i.e. to what extend would they contribute to a different choice of IOL power in in 'old' formulas like e.g. SRK-T and Holladay 1, and in new formulas, like e.g. Olsen or Barrett ?
That's a really good question. In response I would suggest the greatest influence is not the accuracy of these measurements but the final positioning/placement of the IOL.
Its made me think though, I will come back to you when I have done some number crunching.
Greetings. Our experience with the IOL master 700 is favorable, although we believe that there are no significant differences with respect to the previously used formulas. For this we take a study at the moment to determine if it is actually more efficient. I also believe that regardless of the formulas that are very important to determine the power of the intraocular lens, the effective position of the lens and the incisions of surgery are determinant in the result.
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