THE CORRELATION OF PREDICTED AND POSTOPER ATIVE REFRACTION

Background In cataract surgery high quality is demanded. That is why h igh precision in calculation of IOL power is necessary for predicting postoperative refraction. Materials and Methods In a series of 103 pat ients the predicted refraction - calculated by the SRK II formula for only one type of IOL (A-constant 118,9) - was compared to the recieved early and late (3 month) postoperative refraction. Results The accura cy of IOL calculations in 95% was acceptable - within a range of 2 dio pters. The prediction errors of extender values were only shown in cas es of axial length of more than 26 millimeters. Conclusions The result s confirm the fact that by means of SRK II formula the accuracy of IOL calculation is satisfactory in respect of predicted refraktion. In ey es of elongated axial length the accuracy is limited.