The contrast sensitivity was measured with CDVA, considering the low (6.28 cycles per degree), medium (5.07 cpd) or high (3.78) mean spatial frequencies. The mean postoperative UCVA was 20/30 (logMar 0.17) or better and the BCVA 20/25 (logMar 0.098) or better. The study evaluated 14 eyes of nine patients, age 22 to 53 years, mean 34.1 years 66.6 percent were female mean follow-up was 29 months (r: nine to 38 months). Postoperative whole eye (mean 0.133 µm) and internal SA (mean 0.071 µm) were found to be significantly less than control cases (mean 0.223 µm p<0.001 and mean 0.133 p=0.022 respectively).Ī group in Mexico City assessed the safety and effectiveness of the AcrySof Cachet Phakic angle-supported IOL for the correction of high myopia. Postoperative whole-eye MHOAs (mean 0.484 µm) were found to be significantly less ( p<0.001) than age-matched controls (mean 0.648 µm). The RMS of total internal 3rd ( p<0.001), 4th ( p<0.001), 5th ( p=0.033) and 6th ( p=0.006) orders also showed a significant reduction postoperatively. (See results, below.) There was a significant reduction in total root mean square MHOA following surgery ( p<0.001). Zernike coefficients were obtained to the 6th order. MHOAs were measured over a 5-mm dilated pupil diameter using the iTrace aberrometer. Pre- and postoperative data was compared to 300 eyes of 167 age-matched patients with no visually significant cataract. They measured whole-eye, corneal and internal MHOA before and four weeks after surgery. They conducted a prospective, observational study of 50 patients who underwent uncomplicated cataract extraction to evaluate the effectiveness of an aspheric IOL in reducing monochromatic higher-order aberrations (MHOA). The aberrometers showed more agreement at a pupil diameter of 6 mm compared to 4 mm.Surgeons in Glasgow, Scotland, report that an aspheric intraocular lens significantly reduces certain higher-order aberrations. These results suggest that in healthy eyes, the two aberrometers may vary in some details. The iTrace and OPD Scan showed the largest number of differences for aberrations of internal optics rather than total aberrations for both pupil diameters. Aberrations of the internal optics showed significant differences in the mean values of total RMS, spherical aberration (Z4,0), and coma (Z3,-1) between the two devices (p<0.001, p=0.01, p<0.001). At a pupil diameter of 6 mm, the two instruments showed a similar number of total aberrations. Aberrations of the internal optics showed significant differences in the mean values of total RMS, coma (Z3,-1), and trefoil (Z3,3) between the iTrace and OPD Scan (p<0.001, p=0.01, p<0.001) for the same pupil diameter of 4 mm. These parameters, together with the refractive parameters, were then analyzed and complimented by paired t-tests.Īt a pupil diameter of 4 mm, the number of total aberrations in the entire eye showed significant differences for the mean values of spherical aberrations (Z4,0) obtained with the OPD Scan and iTrace aberrometers (p=0.001). For each aberrometer and each eye, the averaged Zernike data were used to calculate various root-mean-square (RMS) data. Aberrations of internal optics and total aberrations were compared for the two aberrometers. We compared the aberrations obtained from measurements obtained at pupillary diameters of 4 mm and 6 mm with the OPD Scan and iTrace. Following pupil dilation, aberrations were measured with the iTrace and OPD Scan. To compare and evaluate the total and internal aberrations measured by two aberrometers: the laser ray tracing aberrometer (iTrace, Tracey Technology) and the automatic retinoscope aberrometer (OPD Scan, Nidek).Ī total of 54 healthy eyes were enrolled in the study.
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