AIM： To study the evolution of the refractive status and examine the affected factors in infants during the first year of life in a large sample size in China. METHODS： A total of 1258 babies （2516 eyes） aged 32w...AIM： To study the evolution of the refractive status and examine the affected factors in infants during the first year of life in a large sample size in China. METHODS： A total of 1258 babies （2516 eyes） aged 32wk gestational age to ty participated in the study, including 766 premature and 492 full-term infants. First, each baby received an orthoptic examination, slit-lamp checking and fundus imaging. Patients with diseases which might affect refractive status were excluded from the cohort. The cycloplegia retinoscopy was performed. Their neonatal histories were reviewed. Each measurement contained the refractive status and calculation of the spherical equivalent （SE）. RESULTS： Refractive state showed an average hyperopia of ＋0.94_＋1.63 D at early ages, followed by a trend toward more hyperopia. The refractive state reached the top （＋2.431.46 D） at the age of one to two months. Then gliding till one year old when the refractive state reached ＋0.59：1.41 D. The prevalence of astigmatism was 42.17% in the study, being 2.82% myopic astigmatism and 39.35% hyperopic astigmatism. The 94.1% of hyperopic astigmatism was with-the-rule astigmatism and 71.83% of myopic astigmatism was with-the-rule astigmatism. Refractive state between boys and girls was different. The mean SE of boys was ＋1.97＋1.57 D, while that of girls was ＋1.79＋1.46 D, and the difference was significant. CONCLUSION： Before one year old, the change of refractive status is associated with checking age and sex. At the age of one to two months, the degree of hyperopia reaches the top. Boys have more hyperopic degree than girls, and with- the-rule astigmatism is predominant. Excluding premature infants with advanced retinopathy of prematurity, premature and full-term children have same refraction status.展开更多
AIM：To determine the prevalence of vision impairment（VI）and refractive error in first year university students at the Tianjin Medical University.METHODS：This is a cross-sectional observational cohort study of VI a...AIM：To determine the prevalence of vision impairment（VI）and refractive error in first year university students at the Tianjin Medical University.METHODS：This is a cross-sectional observational cohort study of VI and refractive error among first year university students at the Tianjin Medical University.The first year university students were involved in this study and were given a detailed questionnaire including age,birth date,and spectacle wearing history.A standardized ophthalmologic examination including visual acuity（VA）,slit-lamp examination,non-cycloplegic auto-refraction,objective refraction,fundus photography,and examination of their spectacles were recorded.RESULTS：A total of 3654 participants were included in this study.Totally 3436（94.03%） individuals had VI in this population.Totally 150（4.10%） individuals had VI due to ocular disease,including amblyopia,congenital cataract,retinal atrophy or degeneration,strabismus,congenital nystagmus,refractive surgery orthokeratology.Totally 3286（89.93%） subjects had VI due to refractive error.Only 218（5.97%） students were emmetropia.Moreover,refractive error was the main cause for the VI（95.63%）.Totally 3242（92.52%） students were myopia and the prevalence of mild,moderate,and high myopia subgroup was 27.05%,44.35%,and 21.26% respectively.Totally 44（1.29%） subjects were hyperopic.The rates of uncorrected visual acuity（UCVA）,presenting visual acuity（PVA）and best corrected visual acuity（BCVA）which better than 20/20 in both eyes were 5.65%,22.32% and 82.13% respectively.The rates of correction,under correction and well correction in myopia subjects were 82.73%,84.39% and 15.61%,respectively. CONCLUSION：We present a high prevalence of refractive errors and high rates of under correction refractive error among first year university students.These results may help to promote vision protection work in young adults.展开更多
基金Supported by Shandong Nature Scienc Foundation(No.ZR2015HM026)
文摘AIM： To study the evolution of the refractive status and examine the affected factors in infants during the first year of life in a large sample size in China. METHODS： A total of 1258 babies （2516 eyes） aged 32wk gestational age to ty participated in the study, including 766 premature and 492 full-term infants. First, each baby received an orthoptic examination, slit-lamp checking and fundus imaging. Patients with diseases which might affect refractive status were excluded from the cohort. The cycloplegia retinoscopy was performed. Their neonatal histories were reviewed. Each measurement contained the refractive status and calculation of the spherical equivalent （SE）. RESULTS： Refractive state showed an average hyperopia of ＋0.94_＋1.63 D at early ages, followed by a trend toward more hyperopia. The refractive state reached the top （＋2.431.46 D） at the age of one to two months. Then gliding till one year old when the refractive state reached ＋0.59：1.41 D. The prevalence of astigmatism was 42.17% in the study, being 2.82% myopic astigmatism and 39.35% hyperopic astigmatism. The 94.1% of hyperopic astigmatism was with-the-rule astigmatism and 71.83% of myopic astigmatism was with-the-rule astigmatism. Refractive state between boys and girls was different. The mean SE of boys was ＋1.97＋1.57 D, while that of girls was ＋1.79＋1.46 D, and the difference was significant. CONCLUSION： Before one year old, the change of refractive status is associated with checking age and sex. At the age of one to two months, the degree of hyperopia reaches the top. Boys have more hyperopic degree than girls, and with- the-rule astigmatism is predominant. Excluding premature infants with advanced retinopathy of prematurity, premature and full-term children have same refraction status.
基金Supported by National Natural Science Foundation of China(No.81500745No.81670875)+1 种基金the Natural Science Foundation of Tianjin(No.16JCQNJC12700No.15JCZDJC34500)
文摘AIM：To determine the prevalence of vision impairment（VI）and refractive error in first year university students at the Tianjin Medical University.METHODS：This is a cross-sectional observational cohort study of VI and refractive error among first year university students at the Tianjin Medical University.The first year university students were involved in this study and were given a detailed questionnaire including age,birth date,and spectacle wearing history.A standardized ophthalmologic examination including visual acuity（VA）,slit-lamp examination,non-cycloplegic auto-refraction,objective refraction,fundus photography,and examination of their spectacles were recorded.RESULTS：A total of 3654 participants were included in this study.Totally 3436（94.03%） individuals had VI in this population.Totally 150（4.10%） individuals had VI due to ocular disease,including amblyopia,congenital cataract,retinal atrophy or degeneration,strabismus,congenital nystagmus,refractive surgery orthokeratology.Totally 3286（89.93%） subjects had VI due to refractive error.Only 218（5.97%） students were emmetropia.Moreover,refractive error was the main cause for the VI（95.63%）.Totally 3242（92.52%） students were myopia and the prevalence of mild,moderate,and high myopia subgroup was 27.05%,44.35%,and 21.26% respectively.Totally 44（1.29%） subjects were hyperopic.The rates of uncorrected visual acuity（UCVA）,presenting visual acuity（PVA）and best corrected visual acuity（BCVA）which better than 20/20 in both eyes were 5.65%,22.32% and 82.13% respectively.The rates of correction,under correction and well correction in myopia subjects were 82.73%,84.39% and 15.61%,respectively. CONCLUSION：We present a high prevalence of refractive errors and high rates of under correction refractive error among first year university students.These results may help to promote vision protection work in young adults.
