In order to investigate the therapeutic effects of undercorrection following radial keratoto- my (RK) and photorefractive keratectomy (PRK) for correction of high myopia by excimer laser in situ keratomileusis (LASIK...In order to investigate the therapeutic effects of undercorrection following radial keratoto- my (RK) and photorefractive keratectomy (PRK) for correction of high myopia by excimer laser in situ keratomileusis (LASIK), LASIK was performed on 32 eyes of 16 patients undergoing RK 2 years ago and 38 eyes of 20 patients undergoing PRK 1 year ago. The postoperative uncorrected visu- al was better than or equal to the preoperative spectacle corrected visual acuity in 49 of 70 eyes (70. 00 %) and achieved the best status of refraction in 64 of 70 (91.43 %). The best postoperatively corrected visual in all operated eyes were equal to their preoperative ones respectively or just lost 1 line. No severe complication occurred during and after operation. It was suggested that LASIK was a better method for treatment of undercorrection following RK and PRK.展开更多
AIM：To evaluate the distribution of refractive error in young subjects in a rural area of Paraguay in the context of an international cooperation campaign for the prevention of blindness. METHODS：A sample of 1466 yo...AIM：To evaluate the distribution of refractive error in young subjects in a rural area of Paraguay in the context of an international cooperation campaign for the prevention of blindness. METHODS：A sample of 1466 young subjects（ranging from 3 to 22 years old）,with a mean age of 11.21±3.63 years old,were examined to assess their distance visual acuity（VA）and refractive error. The first screening examination performed by trained volunteers,included visual acuity testing,autokeratometry and non-cycloplegic autorefraction. Inclusion criteria for a second complete cycloplegic eye examination by an optometrist were VA 〈20/25（0.10 log MAR or 0.8 decimal）and/or corneal astigmatism ≥1.50 D. RESULTS：An uncorrected distance VA of 0 log MAR（1.0decimal）was found in 89.2% of children. VA 〈20/25 and/or corneal astigmatism ≥1.50 D was found in 3.9% of children（n=57）,with a prevalence of hyperopia of 5.2%（0.2%of the total）in this specific group. Furthermore,myopia（spherical equivalent ≤-0.5 D）was found in 37.7% of the refracted children（0.5% of the total）. The prevalence of refractive astigmatism（cylinder ≤-1.50 D）was 15.8%（0.6% of the total）. Visual impairment（VI）（0.05≤VA≤0.3）was found in 12/114（0.4%）of the refracted eyes. Main causes for VI were refractive error（58%）,retinal problems（17%,2/12）,albinism（17%,2/12）and unknown（8%,1/12）.CONCLUSION：A low prevalence of refractive error has been found in this rural area of Paraguay,with higher prevalence of myopia than of hyperopia.展开更多
Uncorrected refractive error（URE） is a major health problem among school children. This study was aimed to determine the frequency and patterns of URE across 4 gradients of residential densities（urban, exurban, sub...Uncorrected refractive error（URE） is a major health problem among school children. This study was aimed to determine the frequency and patterns of URE across 4 gradients of residential densities（urban, exurban, suburban and rural）. This was a cross-sectional study of school children from 3 districts in Yogyakarta and 1 district near Yogyakarta, Indonesia. The information regarding age, sex, school and school grader were recorded. The Snellen＇s chart was used to measure the visual acuity and to perform the subjective refraction. The district was then divided into urban, suburban, exurban and rural area based on their location and population. In total, 410 school children were included in the analyses（urban=79, exurban=73, suburban=160 and rural=98 school children）. Urban school children revealed the worst visual acuity（P〈0.001） and it was significant when compared with exurban and rural. The proportion of URE among urban, suburban, exurban and rural area were 10.1%, 12.3%, 3.8%, and 1%, respectively, and it was significant when compared to the proportion of ametropia and corrected refractive error across residential densities（P=0.003）. The risk of URE development in urban, suburban, exurban, and rural were 2.218（95%CI： 0.914-5.385）, 3.019（95%CI： 1.266-7.197）, 0.502（95%CI： 0.195-1.293）, and 0.130（95%CI：0.017-0.972）, respectively. Urban school children showed the worst visual acuity. The school children in urban and suburban residential area had 2 and 3 times higher risk of developing the URE.展开更多
Objective To analyze the clinical effects after one year follow-up of LASIK for myopia. Methods According to the preoperative diopters of the myopia, patients, undergoing LASIK, were divided into three groups, group ...Objective To analyze the clinical effects after one year follow-up of LASIK for myopia. Methods According to the preoperative diopters of the myopia, patients, undergoing LASIK, were divided into three groups, group Ⅰ: 140 eyes ( -1. 25D ~ -6. 00 D) , group Ⅱ : 205 eyes ( -6. 25D ~ -10. 00D) , group Ⅲ: 226 eyes ( -10.25D- -15.00D). The patients were followed up at least I year. Results By groups, the percentage of the uncorrected visual acuity equal or more than 1. 0 were 94. 29% , 80. 30% , 42. 04% respectively. The residual refractive error within 0. 5D were 99. 29% , 85. 71% , 59. 70%. The spherical equivalent was stable 3 months after LASIK. The complications were few. Conclusion LASIK is a safe, effective and good predictable method for the treatment of myopia. It is one of the best choices to treat myopia below -10. 00D.展开更多
AIM： To assess the effects of small incision lenticule extraction（SMILE） surgery on the corneal endothelium at1 d to 1mo postoperatively.·METHODS： A retrospective, observational study was conducted on 47 pati...AIM： To assess the effects of small incision lenticule extraction（SMILE） surgery on the corneal endothelium at1 d to 1mo postoperatively.·METHODS： A retrospective, observational study was conducted on 47 patients（47 eyes） who received SMILE surgery. Patients were grouped according to contact lens wear condition. The corneal endothelium was examined preoperatively and at 1d, 1wk and 1mo postoperatively.The corneal endothelium was analyzed for endothelial cell density（ECD）, percentage of hexagonal cells, and coefficient of variation（CV） of cell size.·RESULTS： There were no significant decrease in the ECD, percentage of hexagonal cells or increase in CV at1 d, 1wk and 1mo postoperatively（P 〉0.05）. However,there was a small increase of ECD by 2.88% in contact lens wearers（78.26±113.62 cell/mm2, P 〈0.05）.· CONCLUSION： SMILE has no significant adverse effects on the corneal ECD and morphology during 1mo follow-up time.展开更多
文摘In order to investigate the therapeutic effects of undercorrection following radial keratoto- my (RK) and photorefractive keratectomy (PRK) for correction of high myopia by excimer laser in situ keratomileusis (LASIK), LASIK was performed on 32 eyes of 16 patients undergoing RK 2 years ago and 38 eyes of 20 patients undergoing PRK 1 year ago. The postoperative uncorrected visu- al was better than or equal to the preoperative spectacle corrected visual acuity in 49 of 70 eyes (70. 00 %) and achieved the best status of refraction in 64 of 70 (91.43 %). The best postoperatively corrected visual in all operated eyes were equal to their preoperative ones respectively or just lost 1 line. No severe complication occurred during and after operation. It was suggested that LASIK was a better method for treatment of undercorrection following RK and PRK.
文摘AIM：To evaluate the distribution of refractive error in young subjects in a rural area of Paraguay in the context of an international cooperation campaign for the prevention of blindness. METHODS：A sample of 1466 young subjects（ranging from 3 to 22 years old）,with a mean age of 11.21±3.63 years old,were examined to assess their distance visual acuity（VA）and refractive error. The first screening examination performed by trained volunteers,included visual acuity testing,autokeratometry and non-cycloplegic autorefraction. Inclusion criteria for a second complete cycloplegic eye examination by an optometrist were VA 〈20/25（0.10 log MAR or 0.8 decimal）and/or corneal astigmatism ≥1.50 D. RESULTS：An uncorrected distance VA of 0 log MAR（1.0decimal）was found in 89.2% of children. VA 〈20/25 and/or corneal astigmatism ≥1.50 D was found in 3.9% of children（n=57）,with a prevalence of hyperopia of 5.2%（0.2%of the total）in this specific group. Furthermore,myopia（spherical equivalent ≤-0.5 D）was found in 37.7% of the refracted children（0.5% of the total）. The prevalence of refractive astigmatism（cylinder ≤-1.50 D）was 15.8%（0.6% of the total）. Visual impairment（VI）（0.05≤VA≤0.3）was found in 12/114（0.4%）of the refracted eyes. Main causes for VI were refractive error（58%）,retinal problems（17%,2/12）,albinism（17%,2/12）and unknown（8%,1/12）.CONCLUSION：A low prevalence of refractive error has been found in this rural area of Paraguay,with higher prevalence of myopia than of hyperopia.
基金Supported by Department of Ophthalmology, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
文摘Uncorrected refractive error（URE） is a major health problem among school children. This study was aimed to determine the frequency and patterns of URE across 4 gradients of residential densities（urban, exurban, suburban and rural）. This was a cross-sectional study of school children from 3 districts in Yogyakarta and 1 district near Yogyakarta, Indonesia. The information regarding age, sex, school and school grader were recorded. The Snellen＇s chart was used to measure the visual acuity and to perform the subjective refraction. The district was then divided into urban, suburban, exurban and rural area based on their location and population. In total, 410 school children were included in the analyses（urban=79, exurban=73, suburban=160 and rural=98 school children）. Urban school children revealed the worst visual acuity（P〈0.001） and it was significant when compared with exurban and rural. The proportion of URE among urban, suburban, exurban and rural area were 10.1%, 12.3%, 3.8%, and 1%, respectively, and it was significant when compared to the proportion of ametropia and corrected refractive error across residential densities（P=0.003）. The risk of URE development in urban, suburban, exurban, and rural were 2.218（95%CI： 0.914-5.385）, 3.019（95%CI： 1.266-7.197）, 0.502（95%CI： 0.195-1.293）, and 0.130（95%CI：0.017-0.972）, respectively. Urban school children showed the worst visual acuity. The school children in urban and suburban residential area had 2 and 3 times higher risk of developing the URE.
文摘Objective To analyze the clinical effects after one year follow-up of LASIK for myopia. Methods According to the preoperative diopters of the myopia, patients, undergoing LASIK, were divided into three groups, group Ⅰ: 140 eyes ( -1. 25D ~ -6. 00 D) , group Ⅱ : 205 eyes ( -6. 25D ~ -10. 00D) , group Ⅲ: 226 eyes ( -10.25D- -15.00D). The patients were followed up at least I year. Results By groups, the percentage of the uncorrected visual acuity equal or more than 1. 0 were 94. 29% , 80. 30% , 42. 04% respectively. The residual refractive error within 0. 5D were 99. 29% , 85. 71% , 59. 70%. The spherical equivalent was stable 3 months after LASIK. The complications were few. Conclusion LASIK is a safe, effective and good predictable method for the treatment of myopia. It is one of the best choices to treat myopia below -10. 00D.
基金Supported by the National Natural Science Foundation of China(No.81261130021)Henry G Leong Endowed Professorship fund,PolyU research grant GUA32 for supporting the analysis work in Hong Kong
文摘AIM： To assess the effects of small incision lenticule extraction（SMILE） surgery on the corneal endothelium at1 d to 1mo postoperatively.·METHODS： A retrospective, observational study was conducted on 47 patients（47 eyes） who received SMILE surgery. Patients were grouped according to contact lens wear condition. The corneal endothelium was examined preoperatively and at 1d, 1wk and 1mo postoperatively.The corneal endothelium was analyzed for endothelial cell density（ECD）, percentage of hexagonal cells, and coefficient of variation（CV） of cell size.·RESULTS： There were no significant decrease in the ECD, percentage of hexagonal cells or increase in CV at1 d, 1wk and 1mo postoperatively（P 〉0.05）. However,there was a small increase of ECD by 2.88% in contact lens wearers（78.26±113.62 cell/mm2, P 〈0.05）.· CONCLUSION： SMILE has no significant adverse effects on the corneal ECD and morphology during 1mo follow-up time.
