AIM： To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens（IOL） implantation in uncommon cases.METHODS： Totally 24 pa...AIM： To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens（IOL） implantation in uncommon cases.METHODS： Totally 24 patients with high residual refractive error after cataract surgery with IOL implantation were examined. Twenty-two patients had a history of phacoemulsification and IOL implantation, and two had extra-capsular cataract extraction with IOL implantation. Detailed examination of preoperative medical records was done to explain the origin of the post-cataract refractive errors. All patients underwent photorefractire keratectomy（PRK） enhancement. The mean outcome measures were refraction, uncorretted visual acuity（UCVA）, best corrected visual acuity（BCVA） and corneal transparency and follow up ranged from 1 to 8 y.RESULTS： The principal causes of residual ametropia was inexact IOL calculation in abnormal eyes with high myopia and congenital lens abnormalities, followed by corneal astigmatism both suture induced and preexisting. After cataract surgery and before the laser enhancement the mean spherical equivalent（SE） was-0.56±3 D ranging from-4.62 to ＋2.25 D in high myopic patients, instead it was-1±1.73 D ranging from-3.25 to ＋3.75 D in the astigmatic eyes, with a mean cylinder of-3.75±0 ranging from-3 to ＋5.50 D. After laser refractive surgery the mean SE was 0.1±0.73, ranging from-0.50 to ＋1.50 in the myopic group, and it was-0.50±0.57 ranging from-1.25 to ＋0.50 in astigmatic patients, with a mean cylinder of-0.25±0.75. In myopic patients the mean UCVA and BCVA were 0.038±0.072 logMAR and 0.018±0.04 respectively, both ranging from 0.10 to 0.0. In astigmatic patients, the mean UCVA and BCVA were 0.213±0.132 and 0.00±0.0 respectively, UCVA ranging from 0.50 to 0.22 and BCVA was 0.00. All patients presented normal corneal transparency. No ocular hypertension was detected and no corneal haze was observed. All registered values remained stable also at the end line evaluation.CONCLUSION： The excimer laser treatment of residual refractive errors after cataract surgery with IOL implantation in abnormal eyes resulted in satisfactory and stable visual outcome with good safety and efficacy.展开更多
ObjectiveTo investigate the myopia rate of students in Minhang District of Shanghai and to take effective measures in preventing and controlling myopia. MethodsA total of 5 809 students (2 904 boys and 2 905 girls) fr...ObjectiveTo investigate the myopia rate of students in Minhang District of Shanghai and to take effective measures in preventing and controlling myopia. MethodsA total of 5 809 students (2 904 boys and 2 905 girls) from 41 schools (29 middle schools and 12 high schools) who were going to take National College Entrance Examination of China (NCEE) and High School Entrance Examination of Shanghai (HSEE) in 2012 in Minhang District were included in this investigation. The eyesight data of the students, including myopia rates, the disturbing of myopia degree, the differences of myopia rate between different schools, the relationship between the myopia rate and sex, and the relationship between myopia rate and right or left eye, were analyzed. ResultsMyopia was found in 80.3% of the total students. The rate of myopia in high school was 84.0% (90.2% in key high school and 85.1% in general high school with significant difference between them). The rate of myopia in middle school was 78.2% (78.5% in key middle school and 77.9% in general high school without significant difference between them). The myopia rate of high school was higher than that of middle school (P<0.001). In high school, the myopia rate of girls (86.8%) was higher than that of boys (80.8%) (P<0.001). Among all students, the right eyesight (4.361) was lower than the left (4.389) (P<0.001). ConclusionThere is a poor situation in the eyesight of middle school students. The government should take effective measures to publicize the importance of the eyesight health. The education departments and the hospitals must establish the termly examination to decrease the occurrence rate of myopia.展开更多
文摘AIM： To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens（IOL） implantation in uncommon cases.METHODS： Totally 24 patients with high residual refractive error after cataract surgery with IOL implantation were examined. Twenty-two patients had a history of phacoemulsification and IOL implantation, and two had extra-capsular cataract extraction with IOL implantation. Detailed examination of preoperative medical records was done to explain the origin of the post-cataract refractive errors. All patients underwent photorefractire keratectomy（PRK） enhancement. The mean outcome measures were refraction, uncorretted visual acuity（UCVA）, best corrected visual acuity（BCVA） and corneal transparency and follow up ranged from 1 to 8 y.RESULTS： The principal causes of residual ametropia was inexact IOL calculation in abnormal eyes with high myopia and congenital lens abnormalities, followed by corneal astigmatism both suture induced and preexisting. After cataract surgery and before the laser enhancement the mean spherical equivalent（SE） was-0.56±3 D ranging from-4.62 to ＋2.25 D in high myopic patients, instead it was-1±1.73 D ranging from-3.25 to ＋3.75 D in the astigmatic eyes, with a mean cylinder of-3.75±0 ranging from-3 to ＋5.50 D. After laser refractive surgery the mean SE was 0.1±0.73, ranging from-0.50 to ＋1.50 in the myopic group, and it was-0.50±0.57 ranging from-1.25 to ＋0.50 in astigmatic patients, with a mean cylinder of-0.25±0.75. In myopic patients the mean UCVA and BCVA were 0.038±0.072 logMAR and 0.018±0.04 respectively, both ranging from 0.10 to 0.0. In astigmatic patients, the mean UCVA and BCVA were 0.213±0.132 and 0.00±0.0 respectively, UCVA ranging from 0.50 to 0.22 and BCVA was 0.00. All patients presented normal corneal transparency. No ocular hypertension was detected and no corneal haze was observed. All registered values remained stable also at the end line evaluation.CONCLUSION： The excimer laser treatment of residual refractive errors after cataract surgery with IOL implantation in abnormal eyes resulted in satisfactory and stable visual outcome with good safety and efficacy.
文摘ObjectiveTo investigate the myopia rate of students in Minhang District of Shanghai and to take effective measures in preventing and controlling myopia. MethodsA total of 5 809 students (2 904 boys and 2 905 girls) from 41 schools (29 middle schools and 12 high schools) who were going to take National College Entrance Examination of China (NCEE) and High School Entrance Examination of Shanghai (HSEE) in 2012 in Minhang District were included in this investigation. The eyesight data of the students, including myopia rates, the disturbing of myopia degree, the differences of myopia rate between different schools, the relationship between the myopia rate and sex, and the relationship between myopia rate and right or left eye, were analyzed. ResultsMyopia was found in 80.3% of the total students. The rate of myopia in high school was 84.0% (90.2% in key high school and 85.1% in general high school with significant difference between them). The rate of myopia in middle school was 78.2% (78.5% in key middle school and 77.9% in general high school without significant difference between them). The myopia rate of high school was higher than that of middle school (P<0.001). In high school, the myopia rate of girls (86.8%) was higher than that of boys (80.8%) (P<0.001). Among all students, the right eyesight (4.361) was lower than the left (4.389) (P<0.001). ConclusionThere is a poor situation in the eyesight of middle school students. The government should take effective measures to publicize the importance of the eyesight health. The education departments and the hospitals must establish the termly examination to decrease the occurrence rate of myopia.
