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    How new ‘evolving’ IOL formula maximizes lens accuracy


    Importance of ACD in IOL calculations

    With this methodology of 3-D graphical representation, physicians can manipulate these formulae in many different ways. The issue of ACD is an important one when it comes to IOL calculations.

    Parameters, such as axial length and corneal power, always have been related to the calculation of ACD calculation. By using these methods, we separate out the ACD from the modern IOL formulae, and figure out the similarities and differences in various ways ACD is calculated in these formulae.

    This methodology is further applied not only to simple IOL calculations, but also to post-refractive IOL calculations and to accommodating IOLs.

    For post-refractive IOL calculations, we essentially can split the ACD from the vergence calculation of the formulae. We then apply a double K method to treat the ACD and vergence calculation separately. It is generally believed that the ACD calculation is the most critical step in the calculation of IOL power, especially in small eyes with short axial lengths.


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