Corneal Spherical Aberraion in a Population of Patients 在一个人口患者角膜球差.pptVIP

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2018-06-19 发布于福建
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Corneal Spherical Aberraion in a Population of Patients 在一个人口患者角膜球差.ppt

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Corneal Spherical Aberraion in a Population of Patients 在一个人口患者角膜球差

Several aspheric monofocal IOLs have been developed with different SA values to compensate for the corneal SA Tecnis Z9000 -.27μ AcrySof SN60WF -.20μ nanoFLEX Collamer -.019μ Sofport AO 0 Sofport AO nanoFLEX Tecnis SN60WF Literature suggests getting the patient closest to 0 SA to achieve the optimum quality of vision Correct selection of the aspheric IOLs will depend mainly on SA measurements of the cornea To compare the measurements of corneal spherical aberration obtained by the Atlas Corneal Topography (Carl Zeiss, Jena, Germany), Galilei Dual Scheimpflug Analyzer (Ziemer, Port, Switzerland) and the OPD-Scan II (Nidek, Tokyo, Japan). Atlas Corneal Topography Galilei Dual Scheimpflug Analyzer OPD-Scan II A pilot study SA were measured in patients undergoing cataract surgery before dilation. SA measured in the 6 mm optical zone No history of ocular surgery or injury No ocular pathology other than cataract All measurements were done by single trained observer Difference between measurements were analyzed Atlas Galilei OPD Eye 1 0.226 0.37 0.267 Eye 2 0.274 0.25 0.129 Eye 3 0.094 0.18 0.206 Eye 4 0.18 0.3 0.217 Eye 5 0.341 0.29 0.255 Eye 6 0.266 0.28 0.255 Eye 7 0.285 0.27 0.261 Eye 8 0.161 0.31 0.169 Average 0.220 (± 0.05) 0.281 (± 0.05) 0.228 (± 0.08) 8 eyes of 6 patients All females Average age: 73 years ( 63-81) Galilei - Atlas OPD-Atlas Eye 1 0.041 0.144 Eye 2 -0.145 -0.024 Eye 3 0.112 0.086 Eye 4 0.037 0.12 Eye 5 -0.086 -0.051 Eye 6 -0.011 0.014 Eye 7 -0.024 -0.015 Eye 8 0.008 0.149 Average -0.009 (± 0.079) 0.053 (± 0.081) Positive sign = overestimate Negative sign = underestimate This pilot study showed high consistency of measurements of SA among the 3 tested instruments This finding can help the surgeons choose the proper aspheric IOL regardless of which measuring instrument is used. More studies are needed to determine the optimal SA surgeons need to target