Methods of predicting the post-operative position of an IOL and uses of such methods

A computerized method for selecting a replacement intraocular lens required to provide a desired optical property in a post-operative eye of a patient, the method comprising the steps of:

• (a) predicting the post-operative position of a replacement intraocular lens in the eye of the patient by:
• (i) measuring the position of the existing crystalline lens in the pre-operative eye of the patient comprising measuring the Anterior Chamber Depth of the pre-operative eye of the patient;
• (ii) measuring the thickness of the crystalline lens in the pre-operative eye of the patient;
• and
• (iii) calculating the post-operative position of the intraocular lens relative to the position of the crystalline lens in the pre-operative eye of the patient, as a proportion of the thickness of the crystalline lens in the pre-operative eye of the patient, wherein the proportion is defined by a single numerical constant (C) which is determined by the intraocular lens type;
• (b) calculating by computer the optical properties of the post-operative eye of the patient in which an intraocular lens of known power and geometry is positioned as predicted in step (a);
• and
• (c) prescribing an intraocular lens having a power and geometry required to provide the desired optical property in the post-operative eye of the patient.