Three-year follow-up of Clinical Results after SI-30NB Intraocular Lens Implantation Through Temporal Clear Corneal Incision

We examined the clinical results of silicone IOL[SI-30NB]for 3 years or more. A total of 50 eyes underwent phacoemulsification and foldable silicone posterior chamber lens implantation through 3.2 millimeter temporal clear corneal incision. Preoperative and post-operative intraocular pressure, visual acuity, corneal astigmatism and complications were evaluated. More than 94%of all cases showed best corrected visual acuity better than 20/40 and intraocular pressure was decreased for 2 months. At 1 day after operation, mean surgically induced astigmatism was minimal[0.64 +/-1.42]and recovered fast. Posterior capsular opacity was found in 26%;however, Nd-YAG laser capsulotomy was performed in 18%. In conclusion, foldable silicone lens implantation through 3.2 millimetertemporal clear corneal incision revealed a low incidence of complication, minimally induced astigmatism, and rapid visual rehabilitation.

Chanages of Central Corneal Endothelial Cells Following Phacoemulsification Through a Temporal Clear Corneal Incision under Topical Anesthesia

To evaluate the changes of the central corneal endothelial cell density and morphology after phacoemulsification and foldable silicone intraocular lens(IOL) implantation through a 3.2mm temporal clear corneal incision under topical anesthesia. On 43 patients(43 eyes) who had no systemic and ocular disease to influence the status of corneal endothelium , central corneal thickness, central corneal endothelial celldensity, pleomorphism index and polymegathism index, there was significant increase at 1 day postoperatively and recovery to preoperative state at 2 months poeroperatively. Central corneal endothelial cell losses were 8.92% at 1 day postoperatively and 15.95% at 2 months poeroperatively(p=0.00) and statistically significant increase of polymegathism index was noted at 1 day and 2 months poeroperatively. However no significant difference in central corneal endothelial cell loss and polymegathism index was noted at 6 months postoperatively. From the above results, we concluded that the phacoemulsification through a temporal clear corneal incision under topical anesthesia decreases the central corneal endothelial cell density and increase polymegathism index of the corneal endothelial cells, but these changes become stabilized after postoperative 2 months. Also proper control group must be set up to detect causes of corneal endothelial cell loss and it is neede to estalblish a new criteria for safe corneal endothelial cell density.