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    How new ‘evolving’ IOL formula maximizes lens accuracy

     

    Comparing formulae

    With the Ladas-Siddiqui graph, surgeons have the ability to compare multiple formulae to determine where they resemble and differ from each other at entire ranges of corneal power and axial length. By doing so, surgeons can isolate regions of the formulae where a clinical dilemma may occur.

    Surgeons, then, can target these areas as those that require the most discussion and improvement. With this graph, surgeons cannot only compare IOL power differences between formulae, but also various input parameters, such as anterior chamber depth (ACD).

    Figure 3: The Ladas-Siddiqui graph. A graphical representation that highlights areas where the Ladas Super Formula and the SRK/T formula differ from each other by more than 0.5 D.

    Such a task would have taken thousands of eyes to decide upon on a better formula for a given eye. An example of the Ladas-Siddiqui graph is shown in Figure 3, where the Ladas Super Formula is compared with the SRK/T formula.

    Evolution of the Ladas Super Formula

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