Fluorescien angiographic changes after phacoemulsification and YAG laser micropunctures in the posterior capsule in diabetic patients / Samir Abdelrahman Mohamed ; Supervised Effat Abdelnabi , Omar Elzawahry , Rasha Mounir Eltanamly

Thesis (Ph.D.) - Cairo University - Faculty of Medicine - Department of Ophthalmology

Nd:YAG laser, posterior Capsulotomy became the method of choice in treating PCO with good results as regarding visual acuity, contrast sensitivity and lack of glare. Alternatives to LCT are also studied, e.g. polishing with a neodymium:yttrium-lithiumfluoride picosecond laser. A polishing effect in an artificial latex posterior capsule was achieved, but with higher energy settings the IOL was damaged.Complications of Nd:YAG laser, posterior Capsulotomy: Damage to the intraocular lens (IOL). Rupture of the anterior hyaloid face anterior with anterior movement of vitreous which may cause a pupillary block and induce CME, RD and late-onset corneal edema. Increased intraocular pressure. Intraocular infection due to release of pre-existing bacteria encapsulated between the IOL and posterior capsule.We have investigated a new technique for prevention of posterior capsule opacification, summarized as doing circumferential minute punctures in the posterior capsule using minimal amount of Nd:YAG laser energy about 4-6 punctures in every quadrant. We have preserved the central optical zone in the posterior capsule. Using this process we have observed decrease in incidence of central posterior capsule opacification and lens epithelial cells migration onto the posterior capsule utilizing the grading suggested by Tetz and associates in 1997. (145)

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