Comparison of accuracy between ultrasound B scan and partial coherence interferometry (IOL master) in IOL (intraocular lens) power calculation
Journal Title: Indian Journal of Clinical and Experimental Ophthalmology - Year 2018, Vol 4, Issue 4
Abstract
Aims and Objectives To compare the accuracy of ultrasound A scan biometry and IOL master PCI biometry in intraocular power calculation by doing a comparative study of difference in biometry by conventional methods and optical biometry IOL masterMaterials and Methods Place of study Aravind Eye Hospital IndiaDesign of Study Prospective non randomised clinical studyStudy Group and Duration The study involves patients who underwent cataract surgeries at Aravind Eye Hospital Tirunelveli during the specified time periodThe IOL power and predicted refractive outcome were calculated for every patient by both the methods A scan ultrasound Biometry IOL master Partial Coherence interferometryInclusion Criteria Only those patients in whom it was possible to secure a reliable IOL master reading on the basis of good SNR were includedResults In a 12 month period 337 eyes were consecutively enrolled in the study Both ultrasound A scan and partial coherence interferometry was performed and IOL power implanted as per the IOL masterInclusion criterion and exclusion criterion used as mentionedThe difference in between the final and predicted refraction is compared for both the groups The overall Mean absolute error was 0402 0407 with the ultrasound A scan 0388 0406 for the IOL master with the probability value pvalue 03802The mean numerical error the difference between the refractive outcome and the predicted spherical equivalent is 0226 0526 min 266 max 206 for the ultrasound scan group and 0217 0518 min 241 max 210 for the IOL master group with the probability value pvalue being 0514We got a comparative result in our study though not significant but it is more in favour of IOL master PCI as per the mean absolute error and mean numerical error calculationsWhen analysing the Mean Axial Length readings the findings were almost similar with an insignificant pvalueKeywordsBiometry IOL master Power calculation Ultrasound
Authors and Affiliations
Aditi Sharma, Aditya Vikram Sharma
Keywords
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- EP ID EP474860
- DOI 10.18231/2395-1451.2018.0110
- Views 99
- Downloads 0
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