ADVANCED IOL POWER CALCULATIONS Jack T ... - ascrs 2012

ADVANCED IOL CALCULATIONS 2012Surgically InducedRefractive ChangeSIRC• From Keratometry• Cataract & Clear Lensectomy• Keratorefractive Sx.• From Refraction• Keratorefractive Sx.Outcome Analysis• Prediction Error (50% < 0.50 D)• Formula Comparisons• Induced Astigmastism (SIRC)• Visual Acuity• Best Corrected• UncorrectedBack-CalculationsThank you !• Helpful in determining causeof refractive surprise• Back-calculated calculated K, AL and IOLpower compared to pre-op & topost-op op remeasured values• Back-calculated calculated ELP comparedto preoperative prediction byformulaSydney• • • • The International Society of Refractive Surgery • • • •April 23,2002JACK T. HOLLADAY, MD, MSEE, FACS Page 19 of 19