ABSTRACT
<p><b>OBJECTIVES</b>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.</p><p><b>METHODS</b>Combined operations of PEA and PPV were performed on 52 eyes of 52 patients with cataract and vitreoretinal diseases.</p><p><b>RESULTS</b>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).</p><p><b>CONCLUSION</b>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.</p>
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Cataract , Lens Implantation, Intraocular , Methods , Lenses, Intraocular , Light , Perception , Phacoemulsification , Methods , Time Factors , Treatment Outcome , Vision, Ocular , Visual Acuity , Vitrectomy , MethodsABSTRACT
<p><b>OBJECTIVE</b>To investigate corneal refractive changes after scleral buckling surgery.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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.</p><p><b>CONCLUSION</b>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.</p>
Subject(s)
Adolescent , Adult , Aged , Female , Humans , Male , Middle Aged , Cornea , Pathology , Corneal Topography , Postoperative Period , Prospective Studies , Refraction, Ocular , Refractive Errors , Retinal Detachment , General Surgery , Scleral Buckling , Methods , Time FactorsABSTRACT
<p><b>OBJECTIVE</b>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.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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.</p><p><b>CONCLUSION</b>The results demonstrated the efficiency of DHPLC in screening SNPs when coupled with DNA pooling strategy, and in genotyping SNPs.</p>
Subject(s)
Humans , Alcohol Oxidoreductases , Genetics , Chromatography, High Pressure Liquid , Methods , Genotype , Point Mutation , Polymorphism, Single Nucleotide , Genetics , Sequence Analysis, DNAABSTRACT
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.