One-year follow-up evaluation of combined phacovitrectomy for idiopathic epiretinal membrane.

AIM: To evaluate the therapeutic effect of combined phacovitrectomy with membrane peeling and intraocular lens (IOL) implantation in patients with severe idiopathic epiretinal membrane (iERM) and concurrent cataract. METHODS: A total of 34 eyes from 34 patients who underwent phacovitrectomy and epiretinal membrane (ERM) peeling at the First Affiliated Hospital of Zhejiang University between 2015 and 2017. The best-corrected visual acuity (BCVA) and central foveal thickness (CFT) were measured preoperatively and at 1, 3, 6mo and 1y postoperatively. Temporal changes and bivariate correlations of these parameters were analyzed. RESULTS: Mean logMAR BCVA improved and CFT decreased significantly (P<0.001) until 6mo after surgery. Correlation analysis revealed a positive correlation between preoperative and postoperative logMAR BCVA (r=0.716, P<0.001 at 1mo, r=0.417, P=0.014 at 3mo, r=0.359, P=0.037 at 6mo, and r=0.369, P=0.032 at 12mo post-op respectively), but preoperative CFT was neither associated with postoperative CFT nor with postoperative logMAR BCVA. There was a positive correlation between CFT and logMAR BCVA at 1mo (r=0.346, P=0.045), 6mo (r=0.347, P=0.045), and 12mo (r=0.342, P=0.048) post-operatively. The intra- and postoperative complications were relatively mild, and the incidences were generally low. CONCLUSION: For severe iERM patients with significant visual symptoms, combined phacovitrectomy with membrane peeling and IOL implantation is safe and effective in improving BCVA and decreasing CFT. Early surgery in selected patients may help preserving better visual function.

Surgical results of pars plana vitrectomy combined with phacoemulsification.

OBJECTIVES: To evaluate the technical feasibility, safety, outcome, and incidence of complications after combined clear corneal phacoemulsification (PEA) with intraocular lens (IOL) implantation and vitreoretinal surgery. METHODS: Combined operations of PEA and PPV were performed on 52 eyes of 52 patients with cataract and vitreoretinal diseases. RESULTS: The mean follow-up time was (10.3+/-2.8) months. Postoperatively, visual acuity improved in 46 eyes (88.5%); was unchanged in 6 eyes (11.5%). The best-corrected visual acuities (BCVAs) were the following: 20/40 or better (9 eyes), 20/50 to 20/100 (24 eyes), 20/200 (5 eyes), 20/400 (10 eyes), and fingers counting (FC) to light perception (LP) (4 eyes). In 38 eyes BCVA was 20/200 or better, and in 9 eyes it was 20/40 or better postoperatively. Postoperative complications included posterior capsual opacification (7 eyes); secondary glaucoma (1 eye); and retinal detachment (2 eyes). CONCLUSION: Although further studies are indicated, our study suggests that the combined operation of PPV, PEA and IOL implantation is safe and effective for patients. The visual outcome and complications depended primarily on underlying posterior segment pathology and were not related to the combined procedure technique.

Sensory exotropia subsequent to senile cataract.

To evaluate the phacoemulsification and intraocular lens implantation in patients with sensory exotropia subsequent to senile cataract. The authors prospectively studied the role of phacoemulsification and intraocular lens implantation on 25 patients by observing visual acuity, ocular alignment, binocular vision and diplopia pre-, 1 month post- and 3 months post-operation. The patients underwent follow-up for three months. Postoperatively, one patient had a corrected visual acuity of 20/50, and 24 patients had 20/40 or better. The ocular alignment, binocular vision and diplopia were resolved spontaneously. Phacoemulsification and intraocular lens implantation performed together is effective on sensory exotropia subsequent to senile cataract.

[Application of DHPLC in human genomic SNP screening and genotyping for all-trans-retinol dehydrogenase].

OBJECTIVE: To assess the efficacy of denaturing high-performance liquid chromatography (DHPLC) as a new screening assay for sequence variation in SNP detecting and new approach to SNP genotyping. METHODS: DHPLC was used to screen SNPs in 8 DNA pools each consisting of DNA from 5 individuals, and genotype the identified SNPs in 150 Chinese subjects from Hong Kong. RESULTS: Seventeen SNPs were identified: 12 were novel and 5 were previously reported; 11 were found in screening stage and the other 6 were found in genotyping stage; 2 were only found in Caucasian samples; 3 showed ethnic difference of minor allele frequency(MAF); 7 were common with the MAF>0.05 in Chinese samples. CONCLUSION: The results demonstrated the efficiency of DHPLC in screening SNPs when coupled with DNA pooling strategy, and in genotyping SNPs.

[Anterior corneal topographic changes after scleral buckling surgery].

OBJECTIVE: To investigate corneal refractive changes after scleral buckling surgery. METHODS: In a prospective self-controlled clinical study, we investigated the changes of refractive power, astigmatic power, astigmatic axis, and irregular astigmatic power of anterior corneal surface following scleral buckling surgery for retinal detachment in 30 patients (30 eyes). The corneal shapes were detected by Orbscan II topography at 1 day before surgery, and 1 week, 1 month, and 3 months after surgery. The effects of some surgical factors on the anterior corneal refractive changes were analyzed. RESULTS: After surgery, refractive power on corneal anterior surface decreased significantly in peripheral zone at 1 week (P < 0.01). Astigmatic power increased obviously in central zone. The direction of astigmatic axis matched the direction of the buckle, and changed obviously in central zone after 1 week (P < 0.05). Irregular astigmatic power did not change significantly. There was a significant correlation between the encircling length/the buckle width and the refractive changes of corneal anterior surface. CONCLUSION: Refractive changes of corneal anterior surface following scleral buckling surgery was mainly temporary. Changes in the shape of corneal should be minimized to ensure a favorable postoperative visual acuity.

[Phacoemulsification and intraocular lens implantation after scleral buckling surgery].

OBJECTIVE: To determine the intraoperative and postoperative complications and best-corrected visual acuity outcomes of eyes undergoing phacoemulsification and intraocular lens (IOL) implantation after retinal detachment repair by scleral buckling technique. METHODS: The charts of all patients who underwent phacoemulsification and IOL implantation between May 1996 and July 2000 in Zheyi Eye Center were reviewed to identify the eyes with a history of retinal detachment repaired by scleral buckling technique. RESULTS: We identified 33 eyes of 33 patients. The mean interval from phacoemulsification to final examination was (1.9 +/- 1.0) years. The final best-corrected visual acuity of >or= 20/200 was attained in 28 (84.8%) of 33 eyes and >or= 20/50 in 12 (36.4%) of the eyes. With regard to complications, 2 eyes required laser capsulotomy for posterior capsular opacification. No eye developed a retinal re-detachment during 2 years follow-up. CONCLUSION: Phacoemulsification and IOL implantation can be performed safely after scleral buckling surgery and excellent best-corrected visual acuity results can be attained in most eyes. No retinal re-detachment occurred in this series.