Efficacy of Fluid-jet as an Innovative Method to Prevent Posterior Capsular Opacity After Phacoemulsification
Efficacy of Fluid-jet as an Innovative Method to Prevent Posterior Capsular Opacity After Phacoemulsification
Residual lens fibers (RLFs) on the posterior lens capsule during cataract surgery can cause after cataract, affecting visual quality and increasing the medical cost for further laser posterior capsulotomy. However, conventional polish is inconvenient and time-consuming. We use an innovative fluid-jet method to remove RLFs, and compare the efficacy of fluid-jet and polish to prevent posterior capsular opacity after phacoemulsification.
Purpose: Residual lens fibers (RLFs) on the posterior lens capsule during cataract surgery can cause after cataract, affecting visual quality and increasing the medical cost for further laser posterior capsulotomy. However, conventional polish is inconvenient and time-consuming. We use an innovative fluid-jet method to remove RLFs, and compare the efficacy of fluid-jet and polish to prevent posterior capsular opacity after phacoemulsification.
Design: Single-center, prospective, randomized controlled clinical study Subjects of study: Age-related cataract patients receiving phacoemulsification from Zhongshan Ophthalmic Center, Guangzhou, China.
Methods: patients are 1: 1 randomized to two groups. Polish group: After irrigation and aspiration (I/A), the RLFs on the posterior capsule are removed by polishing before intraocular lens (IOL) implantation; Fluid-jet group: Polish is not performed. RLFs on posterior capsule are removed by jetting fluid with an irrigating syringe after IOL implantation. The posterior capsular images of all the patients are obtained immediately before and after IOL implantation, and at the end of surgery, then the amount of RLFs is quantitatively analyzed by using LYZ-PCO, a software we developed. Best corrected visual acuity and parameters of visual quality, such as objective scattering index(OSI), Strehl ratio (SR) and Modulation Transfer Function (Mtf)-cut off are evaluated by objective visual quality analyser (OQAS) at 1 day, 1 week and 1 year after surgery. The patients receives telephone follow-up every month. The severity of posterior capsular opacification (PCO) and incidence of laser posterior capsulotomy is recorded.
Main indicators for the study: The incidence of laser posterior capsulotomy a year after surgery.
Iinclusion criteria:
1) cataract patients aged between 50 and 80 years; 2) graded 5 or less for lens opalescence by the Lens Opacities Classification System, version III (LOCS III); 3) listed for phacoemulsification combined with intraocular lens implantation in topical anesthesia; 4) Signed informed consent.
Exclusion criteria:
1) a history ophthalmic trauma or surgery; 2) other ophthalmic diseases such as glaucoma, uveitis, high myopia; 3) diabetes requiring medical control; 4) disagree with follow-up monitoring; 5) Other factors inappropriate to participate in this project, including but not limited to severe cataracts, very shallow anterior chambers, etc.