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Clinical analysis of IOL power calculation using new partial coherence interferometry

Poster Details

First Author: K.Park SOUTH KOREA

Co Author(s):    M. Jung   S. Kim           

Abstract Details


To analyze the surgical outcomes and the relating factors when there is difference in IOL power calculation using new partial coherence interferometry Lenstar LS900(Haag Streit AG, Koeniz, Switzerland) and previous method.


Department of Ophthalmology, Soonchunhyang University, College of Medicine


In 114 eyes of 114 patients who had undergone cataract surgery were measured axial length and keratometric value using Lenstar, contact type ultrasonograph(Hiscan, Optikon, Italy), and autokeratometer(KR-7100, Topcon, Japan). The power of IOL was calculated with SRK/T formula. Groups were divided according to the difference of IOL power for emmetropia between two methods; above 0.5 D(error group) and less 0.5 D(control group). Corneal refractive power, axial length, mean absolute error(?planned target of refraction - postoperative refraction?) and success rate(mean absolute error <0.5D) were compared between two groups.


Axial length(mm) was significantly longer in error group; 23.26±0.90(US), 23.55±0.94(Lenstar) in error group, 22.88±0.93(US), 23.04±0.90(Lenstar) in control group(p<0.05). Keratometric value(diopter) was siginificantly lower in error group; 43.91±1.45(US), 43.94±1.46(Lenstar) in error group, 44.53±1.41(US), 44.50±1.40(Lenstar) in control group(p<0.05). The difference in mean absolute error and visual success rate between two groups was not statistically significant.


Long axial length, low keratometric value were relating factors to make a difference in IOL power between two methods, but they did not affect the surgical outcomes. FINANCIAL DISCLOSURE?: No

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