Tommy C Y Chan1, Alex L K Ng2, George P M Cheng3, Zheng Wang4, Victor C P Woo3, Vishal Jhanji5. 1. Hong Kong Eye Hospital, Kowloon, Hong Kong; Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong. 2. Department of Ophthalmology, The University of Hong Kong, Hong Kong. 3. Hong Kong Laser Eye Centre, Hong Kong. 4. Guangzhou Aier Eye Hospital, Guangzhou, China. 5. Hong Kong Eye Hospital, Kowloon, Hong Kong; Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong; Centre for Eye Research Australia, University of Melbourne, Melbourne, Australia. Electronic address: vishaljhanji@gmail.com.
Abstract
PURPOSE: To investigate the stability of corneal astigmatism and higher-order aberrations after combined femtosecond-assisted phacoemulsification and arcuate keratotomy. DESIGN: Retrospective, interventional case series. METHODS: Surgery was performed using a VICTUS (Bausch & Lomb Inc, Dornach, Germany) platform. A single, 450-μm deep, arcuate keratotomy was paired at the 8-mm zone with the main phacoemulsification incision in the opposite meridian. The keratotomy incisions were not opened. Corneal astigmatism and higher-order aberration measurements obtained preoperatively and at 2 months and 2 years postoperatively were analyzed. RESULTS: Fifty eyes of 50 patients (mean age 66.2 ± 10.5 years) were included. The mean preoperative corneal astigmatism was 1.35 ± 0.48 diopters (D). This was reduced to 0.67 ± 0.54 D at 2 months and 0.74 ± 0.53 D at 2 years postoperatively (P < .001). There was no statistically significant difference between postoperative corneal astigmatism over 2 years (P = .392). Both magnitude of error and absolute angle of error were comparable between the 2 postoperative time points (P > .283). At postoperative 2 months and 2 years, 72% and 70% of eyes were within 15 degrees of preoperative meridian of astigmatism, respectively. All wavefront measurements increased significantly at 2 months and 2 years (P < .007), except spherical aberration (P > .150). There was no significant difference in higher-order aberrations between 2 months and 2 years postoperatively (P > .486). CONCLUSIONS: Our study showed the stability of femtosecond-assisted arcuate keratotomy. Further studies using other platforms and nomograms are needed to corroborate the findings of this study.
PURPOSE: To investigate the stability of corneal astigmatism and higher-order aberrations after combined femtosecond-assisted phacoemulsification and arcuate keratotomy. DESIGN: Retrospective, interventional case series. METHODS: Surgery was performed using a VICTUS (Bausch & Lomb Inc, Dornach, Germany) platform. A single, 450-μm deep, arcuate keratotomy was paired at the 8-mm zone with the main phacoemulsification incision in the opposite meridian. The keratotomy incisions were not opened. Corneal astigmatism and higher-order aberration measurements obtained preoperatively and at 2 months and 2 years postoperatively were analyzed. RESULTS: Fifty eyes of 50 patients (mean age 66.2 ± 10.5 years) were included. The mean preoperative corneal astigmatism was 1.35 ± 0.48 diopters (D). This was reduced to 0.67 ± 0.54 D at 2 months and 0.74 ± 0.53 D at 2 years postoperatively (P < .001). There was no statistically significant difference between postoperative corneal astigmatism over 2 years (P = .392). Both magnitude of error and absolute angle of error were comparable between the 2 postoperative time points (P > .283). At postoperative 2 months and 2 years, 72% and 70% of eyes were within 15 degrees of preoperative meridian of astigmatism, respectively. All wavefront measurements increased significantly at 2 months and 2 years (P < .007), except spherical aberration (P > .150). There was no significant difference in higher-order aberrations between 2 months and 2 years postoperatively (P > .486). CONCLUSIONS: Our study showed the stability of femtosecond-assisted arcuate keratotomy. Further studies using other platforms and nomograms are needed to corroborate the findings of this study.
Authors: Mohamed Gamal Ebidalla Elghobaier; Mohamed Farag Khalil Ibrahiem; Ahmed Shawkat Abdelhalim; Ahmed Mostafa Eid; Khalid Al Said Murad Journal: Clin Ophthalmol Date: 2020-05-21
Authors: Mohamed Shafik Shaheen; Amir AbouSamra; Hany Ahmed Helaly; Amr Said; Ahmed Elmassry Journal: BMC Ophthalmol Date: 2020-01-02 Impact factor: 2.209