Clinical Application Of IOL Master In Patients Before And After Laser-assisted In Situ Keratomileusis

PURPOSE:To make comparison of biometry data including axial length(AL) and corneal refractive power(K) obtained from IOL Master and conventional measurement(ultrasound, ATLAS topography) in patients prefer to laser-assisted in situ keratomileusis preoperatively, also postoperative K readings.METHODS:28 consecutive cases(55 eyes) with prior refractive surgery were evaluated in this study. Patients were scheduled for optical biometry(IOL Master) and conventional measurement(A-scan applanation ultrasound and Humphrey(?) ATLASTM 995)before and after surgery, to analyse the difference between devices.RESULTS:Preoperative AL and K measurements both reach nice agreement between devices(0.985,0.983 respectively),however, significant mean difference exist in AL obtained from IOL Master and Ultrasound(p<0.05), but no statistically significant found in K reading measured by IOL Master and topography (P>0.05). Postoperatively, K reading measured by IOL Master was significantly lower than ATLAS topography (p<0.05), with high correlation(r=0.970).CONCLUSIONS:The non contact biometry assess AL and K precisely before corneal refractive surgery, in contrast to conventional measurement. And get relative smaller K reading after surgery, compare with ATLAS topography. We suggest it a promising method for preoperative examination and postoperative follow-up evaluation in LASIK.