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AIM: To investigate the differences of myopia and ocular biological parameters of primary and middle school students in Urumqi.METHODS: A cross-sectional survey. A total of 2 495 primary and middle school students aged 7 to 18 from 4 schools in Urumqi were selected by judgemental sampling from September 2021 to November 2021 for relevant eye examination. The differences of ocular biological parameters and refractive status of students of different ages, genders and nationalities were compared, and the correlation between spherical equivalent(SE)and ocular biological parameters was analyzed.RESULTS: The detection rate of poor vision among the students was 80.36%, the detection rate of myopia was 55.91%, and the detection rate of astigmatism was 42.96%, among which the detection rate of low myopia was 63.80%, the detection rate of moderate myopia was 27.60%, and the detection rate of high myopia was 8.60%. There were significant differences in the detection rate of poor vision, myopia, astigmatism, SE and some ocular biological parameters among students of different ages and nationalities(all P<0.05). Among them, the detection rate of myopia, astigmatism and poor vision among Uygur and Kazakh ethnic groups was significantly lower than that of Han. The detection rate of poor vision and myopia among boys was lower than that among girls, while the detection rate of astigmatism was higher than that of girls. Spearman correlation analysis showed that axis length of eye, axial length to axial ratio, anterior chamber depth, and pupil diameter were negatively correlated with SE(rs=-0.664, -0.724, -0.320, -0.086, all P<0.001), and lens thickness was positively correlated with SE(rs=0.147, P<0.001).CONCLUSION: The prevalence of myopia among primary and secondary school students in Urumqi is high, and there are differences in the distribution of ocular biological parameters among children and adolescents of different ages and ethnicities.
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AIM: To investigate the myopia and hyperopia reserve among Uyghur children aged 6～12 in Yecheng county of Xinjiang.METHODS: In a cross-sectional study, a total of 50 151 Uyghur students aged 6～12 years from Yecheng county of Xinjiang underwent comprehensive vision screening, including automatic computer optometry, indoor remote light box E-word standard logarithmic visual acuity chart(GB 11533), to measure the naked eye distant vision and corrected vision with lens.RESULTS: From October 2021 to January 2022, the spherical equivalent(SE)of 6-12 year old Uyghur myopic children was -0.875(-1.625, -0.625)D, and the detection rate of myopia was 6.75%(3384/50151)in Yecheng county of Xinjiang. The SE of the myopic children aged 6～12 was -0.75(-1.125, -0.625)D, -0.75(-1.125, -0.625)D, -0.875(-1.125, -0.625)D, -0.875(-1.375, -0.625)D, -0.875(-1.6, -0.625)D, -0.875(-1.625, -0.625)D, -1.25(-2.125, -0.75)D, respectively. The SE of non-myopic children aged 6～12 was +0.25(-0.125, +0.5)D, and the detection rate of insufficient hyperopia reserve was 75.51%. The SE of the non-myopic children aged 6～12 was +0.25(-0.125, +0.5)D, +0.25(0, +0.5)D, +0.125(-0.125, +0.5)D, +0.25(-0.125, +0.5)D, +0.125(-0.125, +0.5)D, +0.125(-0.125, +0.5)D, +0.25(-0.125, +0.625)D, respectively. The detection rates of myopia children aged 6～12 were 6.78%, 5.64%, 5.72%, 5.36%, 5.01%, 6.82%, 12.14%, respectively. The detection rates of insufficient hyperopia reserve children aged 6～12 were 91.67%, 92.04%, 92.91%, 83.85%, 68.89%, 54.01%, 26.71%, respectively. The detection rate of insufficient hyperopia reserve in non-myopic girls aged 9～12 years old was higher than that in boys(χ2=8.94, 19.99, 19.91 and 39.11, all P<0. 05); The detection rate of myopia in 10～12 year old girls was higher than that in boys(χ2=5.402, 8.493 and 36.9711, all P<0. 05).CONCLUSIONS: The prevalence rate of myopia among Uyghur children aged 6～12 years in Yecheng county of Xinjiang was 6.75%, while the detection rate of insufficient hyperopia reserve in non-myopic children reached up to 75.51%. It is predicted that there are a large number of children at high risk of myopia. Therefore, early monitoring of hyperopia reserve in children is vital for myopia prevention and control strategy.
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AIM: To evaluate the prevalence and potential risk factors of dry eye among residents in Hotan, Xinjiang, China.METHODS: A cross-sectional study was conducted on 6 027 residents aged 18-98 from 105 villages in Hotan, Xinjiang, China from January 2019 to September 2019. The subjective symptoms of dry eye were collected by ocular surface disease index(OSDI)questionnaire, and the objective signs were collected by testing fluorescein breakup time(FBUT)and Schirmer Ⅰ test, so as to analyze the prevalence and risk factors of dry eye.RESULTS: A total of 6 339 subjects aged 18-98 years were recruited from residents in Hotan, Xinjiang, China. Relevant eye examinations and questionnaires were conducted on the subjects, of which 6 027 were valid questionnaires, with an effective recovery rate of 95.08%. The dry eye detection rate of 6 027 residents was 40.37%(2 433/6 027), and the dry eye detection rates of male and female were 36.47%(846/2 320)and 42.81%(1 587/3 707)respectively. The dry eye detection rates of 18-24 years old, 25-34 years old, 35-44 years old, 45-54 years old, 55-64 years old, and ≥65 years old were 13.77%, 15.67%, 33.31%, 46.35%, 47.65%, 53.50%, respectively. According to the severity of dry eye, they were divided into mild dry eye, moderate dry eye and severe dry eye, and their constituent ratios were 80.11%, 19.03% and 0.86%, respectively.CONCLUSION: The prevalence of dry eye in the study population was 40.37%. The prevalence of dry eye in female was higher than that in male, and the prevalence of dry eye increased with the increase of age. Older age and female are the risk factors for dry eye.
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·AIM: To evaluate meibomian gland dysfunction (MGD) after phacoemulsification surgery,and to discuss the potential impact of ocular surface. ·METHODS: A perspective, self-controlled clinical trial was conducted. Fifty-six eyes of 56 patients with MGD underwent phacoemulsification and were evaluated the ocular surface disease index (OSDI), meibography score,lid margin abnormalities, Schirmer test, tear film break - up time ( BUT ) at preoperatively and postoperatively 2wk,1 and 3mo. ·RESULTS: Schirmer test did not change significantly postoperatively ( P > 0. 05 ). The OSDI scores, meibography score, lid margin abnormalities increased at 2wk, 1 and 3mo postoperatively compared to before operation (all P<0.05);BUT decreased (P<0.05). · CONCLUSION: Meibomian gland function may be aggravated after phacoemulsification surgery.
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AIM: To observe the effect of 25G- assisted scleral buckling under direct vision in the treatment of retinal detachment in silicone oil-filled eyes.?METHODS: In the retrospective case study, 15 eyes of 15 patients who had retinal detachment after silicone oil filling were treated with 25G- assisted scleral buckling under direct vision. Experimental patients were followed up for 3-6mo to observe the retinal reattachment, visual acuity and intraocular pressure.?RESULTS: There were 15 eyes of 15 patients with inferior retinal detachment before operation. Retinal reattachment was achieved in 13 eyes (13 patients), and retina failed to be reattached in 2 eyes ( 2 patients ) after operation. Furthermore, postoperative visual acuity was found to be improved more than one line in 11 eyes ( 11 patient ) , unchanged in 3 eyes ( 3 patients ) , and decreased more than one line in 1 eye ( 1 patient ) . Meanwhile, early postoperative intraocular pressure increased in some patients and returned to normal after drug control.?CONCLUSION:The 25G-assisted scleral buckling under direct vision has a definite curative effect in the treatment of retinal detachment in silicone oil-filled eyes.
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? AlM: To observe the differences of central cornea thickness, anterior chamber depth, corneal anterior curvature and corneal posterior curvature between the Kazak and the Han nationality college emmetropia students, and analyze the relationship of corneal thickness and corneal curvature.?METHODS: More than 500 students in grade one in Xinjiang Medical University for screening, selected 55 emmetropia eyes in Han nationality students and 51 in Kazak students. Sirius corneal topography was applied to the measurement.? RESULTS: Kazak and the Han nationality college emmetropia students' central cornea thickness ( Kazak:0. 52± 0. 03mm, Han:0. 54 ± 0. 03mm), anterior chamber depth (Kazak:2. 97 ± 0. 31mm, Han: 3. 14 ± 0. 25mm) had significant difference (P0. 05). Han had no significant relationship in corneal thickness and corneal anterior curvature (r<0), or in corneal posterior curvature ( r < 0. 1 ) . Kazak had no significant relationship in corneal thickness and corneal anterior curvature (r<0), or in corneal posterior curvature(r<0. 1).? CONCLUSlON: There are significant differences between the Kazak and the Han nationality college emmetropia students in cornea thickness, anterior chamber depth. There is no significant relationship between corneal thickness and corneal curvature (K1, K2) in Kazak and the Han nationality college emmetropia students.
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Background Vitretomy and lenstomy with silicone oil tamponade is an effective method for complicated vitreous retinopathy.The severe anisometropia after silicone retention is usually treated by two-point transscleral suture fixation for posterior chamber intraocular lens(IOL)implantation.In order to reduce the number and difficulty and complication of the operation,the surgical method should be improved.Objective The goal of this study was to observe the resuh of silicone oil removal combined with four-point trans-scleral suture fixation of posterior chamber IOL after vitrectomy.Methods A retrospective case-observational study design was adopted.Twenty eyes with silicone oil tamponade from 20 patients without lens and posterior capsule after vitrectomy were included in this study.Silicone oil removal with four-point trans-scleral suture fixation of posterior chamber IOL was performed.The anterior ocular inflammatory response,intraocular pressure,uncorrected and corrected acuities before and after operation,corneal endothelial cell counting and postoperative complications were observed and analyzed.Written informed consent was obtained from all patients prior to the operation.Results All of the operative eyes in this study showed improvement of visual acuity after operation.Of the 20 eyes,a visual acuity of ≥0.8 was seen in 2 eyes,0.6-0.7 in 6 eyes,0.3-0.5 in 8 eyes and 0.05-0.2 in 4 eyes 3 months after the removal of silicone oil.The uncorrected acuity postoperation was significantly improved in comparison with preoperation(H=10.147,P＜0.01),but no significant difference was found in the corrected acuity between preoperation and postoperation(X =2.089,P＜ 0.01).The number of the corneal endothelial cells was(2064±329)cells/mm2 before operation,and that after operation was(1987±269)cells/mm2,showing an insignificant change between them(t =1.660,P ＞ 0.05).No abnormality of IOL position was found in all 20 operated eyes.There was not serious postoperative complication in all 20 patients.Conclusions The combination of silicon oil extraction with four-point transscleral suture fixation IOL is effective in eyes without posterior capsule or lens after vitrectomy.It can reduce the operation time and improve the postoperative acuity and the quality of life of patients.