[Recent outcomes of vitreous surgery for diabetic retinopathy].

PURPOSE: To investigate background, surgical method, complications, prognosis, and prognostic factors in patients undergoing vitrectomy for diabetic retinopathy. SUBJECTS AND METHODS: Three hundred and forty eyes of 261 patients undergoing vitrectomy for diabetic retinopathy in five recent years were studied regarding background, surgical method, complications, and visual prognosis. Factors influencing postoperative visual acuity and complications were also examined using univariate and multivariate analyses. RESULTS: Final postoperative visual acuity (FPVA) improved in 226 eyes (66%). FPVA of 0.1 or better and 0.5 or better was achieved in 80% and 45% of all patients, respectively. Postoperative complications occurred in 89 eyes(26%). In the vitreous hemorrhage group, FPVA improved in 86%, and FPVA of 0.5 or better was achieved in 60%. Postoperative complications were most common in the traction detachment group and the percentage was 40%. Factors influencing FPVA were preoperative visual acuity, postoperative complications, indications for surgery, and preoperative severity. Factors influencing postoperative complications were patient background, preoperative visual acuity, preoperative severity, and iatrogenic breaks. CONCLUSIONS: Vitrectomy is a useful method for diabetic retinopathy but postoperative complications must be managed.

[Opacification of Hydroview intraocular lenses necessitating lens replacement].

PURPOSE: We report the opacification of Hydroview intraocular lenes necessitating lens replacement. SUBJECTS AND METHODS: This study includes 9 eyes of 7 patients (4 eyes of 3 men and 5 eyes of 4 womens, 52-92 years old) who underwent lens replacement at our hospital. A clinicopathological study and speculation on the incidence of Hydroview opacification were carried over. RESULTS: All patients had hypertension and 3 had diabetes mellitus. Four eyes of 3 cases and 2 eyes of 2 cases demonstrated diabetic retinopathy and pseudoexfoliaton syndrome, respectively. Four of 6 cases, who underwent bilateral lens implantation, showed unilateral opacification. The duration from lens implantation to exchange ranged from 17 to 38 months. Slit-lamp examination revealed generalized opacification with white granular deposits on the lens optic surface, but transparency inside the optic. Three explanted lenses were stained with 1% alizarin red, and were positive for calcium in all cases. The remaining 6 lenses were analyzed with scanning electron microscopy, and showed electrondense granular deposits of 1 to 4 microm diameter. It is theorized that the incidence of Hydroview opacification and necessity of replacement were more than 3.8% and 3.6%, respectively, from the data at one hospital. CONCLUSION: Calcium deposition on Hydroview might occur in more than 3.8% of cases.