![]() ![]() It had been reported that 30% or more cataract patients have corneal astigmatism greater than 1.00 diopter (D), and ocular residual astigmatism may influence postoperative outcomes. The RCLS simplifies marking procedures and may have potential clinical application to improve the postoperative visual outcomes in surgical correction of corneal astigmatism.Ĭorrection of pre-existing corneal astigmatism during cataract surgery is increasingly accepted in clinical practice because it can improve visual quality and minimize postoperative spectacles dependence. The RCLS can accurately analyze and display the axis for corneal astigmatism greater than 1.00 D in real-time. The Bland-Altman analysis revealed that the RCLS agreed sufficiently well with the Scheimpflug method. A linear correlation of astigmatic axis was noted between the two methods: Axis RCLS = 1.01 × Axis Scheimpflug − 1.02 (R 2 = 0.998, P < 0.001). The axial deviation of corneal astigmatism between the two methods was 0.63 ± 3.78° when astigmatism was 1.00 to 2.00 D and decreased to 0.06 ± 1.38° when astigmatism was greater than 2.00 D. The RCLS was able to display the axis of corneal astigmatism in real-time. The accuracy of the RCLS was compared with the Scheimpflug method. ![]() The MB-Ruler 4.0 software was used to measure the astigmatic axis. Thereafter, the axis of corneal astigmatism was analyzed in real-time and displayed by the RCLS on supine position, and videos were recorded. Scheimpflug imaging measurements (Pentacam HR, Oculus, Wetzlar, Germany) were performed on all subjects to determine the axis and power of corneal astigmatism. The RCLS was composed of a circular light-emitting diode (LED) light source, surgical microscope, surgical video system, computer and self-programming image analysis software. Methodsįifty-seven eyes of 39 volunteers with corneal astigmatism more than 1.00 diopter (D) were recruited. doi: 10.1364/OL.44.004167.2003 110:840-859.To construct a real-time computerized location system (RCLS) to analyze and display the axis of corneal astigmatism and to compare its accuracy with the Scheimpflug method. Akondi, Vyas Steven, Samuel Dubra, Alfredo (August 2019) “Centroid error due to non-uniform lenslet illumination in the Shack–Hartmann wavefront sensor”.Optics Letters.“Accounting for focal shift in the Shack–Hartmann wavefront sensor”. Akondi, Vyas Dubra, Alfredo (August 2019).Cataract and refractive surgery, Volume 2. “Laser ray tracing versus Hartmann-Shack sensor for measuring optical aberrations in the human eye”. Integration of Corneral Topography and Wave- front. Comparison of Dysfunctional Lens Index and Scheimpflug Lens Densitometry in the Evaluation of Age-Re- lated Nuclear Cataracts. Faria-Correia F, Ramos I, Lopes B, Monteiro T, Franqueira N, Ambrosio R, Jr.Correlations of Objective Metrics for Quantifying Dysfunctional Lens Syndrome with Visual Acuity and Phacodynamics. Faria-Correia F, Ramos I, Lopes B, Monteiro T, Franqueira N, Ambrósio R Jr.Dysfunctional Lens Index Serves as a Novel Surgery Decision-Maker for Age-Related Nuclear Cataracts. Zhangliang Li, Liuqing Yu, Ding Chen, Pingjun Chang, Dandan Wang, Yinying Zhao, Songjia Liu, Yun-E Zhao.Poster session presented at: The Annual Meeting of the Association for Research in Vision and Ophthalmology 2012 May 06 -10 Fort Lauderdale, FL. Comparison of the iTrace vs Nidek Optical Path Difference (OPD) on a Model Eye Central. Series B, Containing Papers of a Biological Character. Proceedings of the Royal Society of London. H (1993).””The Luminous Efficiency of Rays Entering the Eye Pupil at Different Points”. Proceedings of the Royal Society B: Biological Sciences. Westheimer, G (2008) “Directional sensitivity of the retina: 75 years of Stiles-Crawford effect”.Light and Matter: Electromagnetism, Optics, Spectroscopy and Lasers, Y. ![]()
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