AIM:To explore changes in the optic disc and peripapillary atrophy(PPA)in school-age children with ametropia using color fundus photography combined with artificial intelligence(AI)technology.METHODS:Based on the retr...AIM:To explore changes in the optic disc and peripapillary atrophy(PPA)in school-age children with ametropia using color fundus photography combined with artificial intelligence(AI)technology.METHODS:Based on the retrospective case-controlled study,226 eyes of 113 children aged aged 6–12y were enrolled from October 2021 to May 2022.According to the results of spherical equivalent(SE),the children were divided into four groups:low myopia group(66 eyes),moderate myopia group(60 eyes),high myopia group(50 eyes)and emmetropia control group(50 eyes).All subjects underwent un-aided visual acuity,dilated pupil optometry,best-corrected visual acuity(BCVA),intraocular pressure,ocular axis measurement and color fundus photography.RESULTS:The width of PPA,horizontal diameter ratio of PPA to the optic disc and area ratio of PPA to the optic disc were significantly different among the four groups(P<0.05).The width of the nasal and temporal neuroretinal rim,the roundness of the optic disc,the height of PPA,the vertical diameter ratio of PPA to the optic disc,and the average density of PPA in the high myopia group were significantly different compared with the other three groups(P<0.05).There were strong negative correlations between SE and area ratio of PPA to the optic disc(r=-0.812,P<0.001)and strong positive correlation between axial length(AL)and area ratio of PPA to the optic disc(r=0.736,P<0.001).CONCLUSION:In school-age children with high myopia,the nasal and temporal neuroretinal rims are narrowed and even lost,which have high sensitivity.The area ratio of the PPA to the optic disc could be used as an early predictor of myopia progression,which is of great significance for the development prevention and management of myopia.展开更多
We have carried out a bibliometric analysis on the development of ametropia literature to determine its growth rule and tendency,and to provide the basis for the problems related to ametropia research.Literatures that...We have carried out a bibliometric analysis on the development of ametropia literature to determine its growth rule and tendency,and to provide the basis for the problems related to ametropia research.Literatures that contained the descriptors of ametropia in title or paper published before Nov.10,2010 in PubMed databases(www.ncbi.nlm.nih.gov/Pubmed) were selected.As bibliometric indicators of ametropia,biomedical journals referring to ophthalmology by ISSN were calculated.The principal bibliometric indicators:Price's and Bradford's laws were applied on the increase or dispersion of scientific literature,the participation index of languages and the journals.By means of manual coding,literatures were classified according to documents study and statistical analysis.The literatures cited in ametropia,astigmatism,myopia and hypermetropia had accumulated to 26475,which consists of Review(n =1560),Randomized Controlled Trial(n =776),Practice Guideline(n =10),Meta-Analysis(n =23),Letter(n =1222),Editorial(n =328),Clinical Trial(n =1726) and Others(n =20830);and Humans(n =23073),Animals(n=1434) and Others(n =1968).1136 literatures were included in PubMed Central,22384 in MEDLINE and 2955 in others.The ametropia literatures rose every 5 years which of the ametropia-year cumulated amount of the literatures had three periods:before 1900,slowly increasing from 1901 to 1950,rapidly rising from 1951 to 2010(increased approximate exponentiation exponent).Sixty kinds of languages were listed in PubMed databases,of which English was dominant for aborting to ametropia research documents before 2010(77.32%,20471/26475).The document language of top eight accounted for 95.58%(English,German,French,Japanese,Russian,Italian,Spanish,Chinese),and others for 4.42%(1171/26475).The SCI database includes 48 ophthalmologic journals and the impact factor of 39 journals is ≥ 1 on Thomson-Reuters in 2010.Of 48 ophthalmologic journals,there were 14785 documents(55.85%) of ametropia,astigmatism,myopia,and hypermetropia.Others were without exception.The bibliometric analysis results show that ametropia literature are increased progressively,approximate exponentiation exponent during 1951-2010.In addition,ametropia research has become more popular since nearly half century.展开更多
Ametropia is one of the leading causes of visual impairment. This study describes epidemiological and clinical aspects of ametropia as part of a free medical care program in Kinkala, Republic of Congo. Patients and Me...Ametropia is one of the leading causes of visual impairment. This study describes epidemiological and clinical aspects of ametropia as part of a free medical care program in Kinkala, Republic of Congo. Patients and Methods: We conducted a cross-sectional study from August 25th to September 24th, 2019;patients presenting complaints suggestive of ametropia were evaluated. The ametropia was determined by the objective method under cyclopentolate eye drops according to the following protocol: 3 applications of one drop every 5 minutes, followed by auto-refractometry at least 45 minutes after the first instillation. The auto-refractometer gave us the objective refraction. An anatomical examination was performed in order to eliminate any organic pathology. Results: Of the 2352 patients received, only 137 patients were included in our survey. Of the 137, 14 were emmetropic. Astigmatism was the most common ametropia. Its axis reversed with age, with more than 65% of direct astigmatism before age 40. There was nearly 65% of reversed astigmatism at 60 years and over. In spherical equivalents, hyperopia accounted for more than 80% of ametropia. Conclusion: Ametropia in Kinkala is dominated by astigmatism. Spherical equivalent, hyperopia represents more than 80% of refractive error.展开更多
A case series of 4 siblings who had auto-refraction and subjective refraction, refinement was with 0.25 Jackson Cross Cylinder. Presenting complaint was either blurring of distant vision or missing eye glasses. The el...A case series of 4 siblings who had auto-refraction and subjective refraction, refinement was with 0.25 Jackson Cross Cylinder. Presenting complaint was either blurring of distant vision or missing eye glasses. The eldest sibling started using eye glasses at 15 years of age while the other siblings commenced much earlier. Presenting visual acuities in 7 eyes ranged from 6/9 to 6/18, one eye of the eldest sibling had visual acuity of 6/36. Spherical errors had gender bias with the males more likely to be hypermetropic and the females more likely to be myopic. However, cylinder powers and axes were closely related in all siblings. It was concluded that heredo-familial traits could partly account for some of the striking similarities noted in the outcomes of refraction among the siblings.展开更多
Purpose: To investigate the efficacy of progressive addition lenses on the treatment of ametropia and loss of accomodation after the single eye's IOL implantation. Methods:.Eighty four patients undergoing IOL impl...Purpose: To investigate the efficacy of progressive addition lenses on the treatment of ametropia and loss of accomodation after the single eye's IOL implantation. Methods:.Eighty four patients undergoing IOL implantation in single eyes were prescribed with progressive addition lenses for ametropia correction and regularly followed up to observe subsequent correction effect. Results:.Among these 84 patients,.72 could comfortably adapt to the use of progressive addition lenses to improve visual acuity and accomondation,while the remaining 12 patients failed to accomodate the usage of progressive addition lenses. Conclusion:.Wearing progressive addition lenses acts as a relatively feasible approach to improve visual acuity and alleviate disorders of accomodation for patients who underwent IOL implantation in single eyes..The patients should be prescribed with progressive lenses under professional instructions and guidance.展开更多
文摘AIM:To explore changes in the optic disc and peripapillary atrophy(PPA)in school-age children with ametropia using color fundus photography combined with artificial intelligence(AI)technology.METHODS:Based on the retrospective case-controlled study,226 eyes of 113 children aged aged 6–12y were enrolled from October 2021 to May 2022.According to the results of spherical equivalent(SE),the children were divided into four groups:low myopia group(66 eyes),moderate myopia group(60 eyes),high myopia group(50 eyes)and emmetropia control group(50 eyes).All subjects underwent un-aided visual acuity,dilated pupil optometry,best-corrected visual acuity(BCVA),intraocular pressure,ocular axis measurement and color fundus photography.RESULTS:The width of PPA,horizontal diameter ratio of PPA to the optic disc and area ratio of PPA to the optic disc were significantly different among the four groups(P<0.05).The width of the nasal and temporal neuroretinal rim,the roundness of the optic disc,the height of PPA,the vertical diameter ratio of PPA to the optic disc,and the average density of PPA in the high myopia group were significantly different compared with the other three groups(P<0.05).There were strong negative correlations between SE and area ratio of PPA to the optic disc(r=-0.812,P<0.001)and strong positive correlation between axial length(AL)and area ratio of PPA to the optic disc(r=0.736,P<0.001).CONCLUSION:In school-age children with high myopia,the nasal and temporal neuroretinal rims are narrowed and even lost,which have high sensitivity.The area ratio of the PPA to the optic disc could be used as an early predictor of myopia progression,which is of great significance for the development prevention and management of myopia.
基金National Science Foundation of China (No.39580683)
文摘We have carried out a bibliometric analysis on the development of ametropia literature to determine its growth rule and tendency,and to provide the basis for the problems related to ametropia research.Literatures that contained the descriptors of ametropia in title or paper published before Nov.10,2010 in PubMed databases(www.ncbi.nlm.nih.gov/Pubmed) were selected.As bibliometric indicators of ametropia,biomedical journals referring to ophthalmology by ISSN were calculated.The principal bibliometric indicators:Price's and Bradford's laws were applied on the increase or dispersion of scientific literature,the participation index of languages and the journals.By means of manual coding,literatures were classified according to documents study and statistical analysis.The literatures cited in ametropia,astigmatism,myopia and hypermetropia had accumulated to 26475,which consists of Review(n =1560),Randomized Controlled Trial(n =776),Practice Guideline(n =10),Meta-Analysis(n =23),Letter(n =1222),Editorial(n =328),Clinical Trial(n =1726) and Others(n =20830);and Humans(n =23073),Animals(n=1434) and Others(n =1968).1136 literatures were included in PubMed Central,22384 in MEDLINE and 2955 in others.The ametropia literatures rose every 5 years which of the ametropia-year cumulated amount of the literatures had three periods:before 1900,slowly increasing from 1901 to 1950,rapidly rising from 1951 to 2010(increased approximate exponentiation exponent).Sixty kinds of languages were listed in PubMed databases,of which English was dominant for aborting to ametropia research documents before 2010(77.32%,20471/26475).The document language of top eight accounted for 95.58%(English,German,French,Japanese,Russian,Italian,Spanish,Chinese),and others for 4.42%(1171/26475).The SCI database includes 48 ophthalmologic journals and the impact factor of 39 journals is ≥ 1 on Thomson-Reuters in 2010.Of 48 ophthalmologic journals,there were 14785 documents(55.85%) of ametropia,astigmatism,myopia,and hypermetropia.Others were without exception.The bibliometric analysis results show that ametropia literature are increased progressively,approximate exponentiation exponent during 1951-2010.In addition,ametropia research has become more popular since nearly half century.
文摘Ametropia is one of the leading causes of visual impairment. This study describes epidemiological and clinical aspects of ametropia as part of a free medical care program in Kinkala, Republic of Congo. Patients and Methods: We conducted a cross-sectional study from August 25th to September 24th, 2019;patients presenting complaints suggestive of ametropia were evaluated. The ametropia was determined by the objective method under cyclopentolate eye drops according to the following protocol: 3 applications of one drop every 5 minutes, followed by auto-refractometry at least 45 minutes after the first instillation. The auto-refractometer gave us the objective refraction. An anatomical examination was performed in order to eliminate any organic pathology. Results: Of the 2352 patients received, only 137 patients were included in our survey. Of the 137, 14 were emmetropic. Astigmatism was the most common ametropia. Its axis reversed with age, with more than 65% of direct astigmatism before age 40. There was nearly 65% of reversed astigmatism at 60 years and over. In spherical equivalents, hyperopia accounted for more than 80% of ametropia. Conclusion: Ametropia in Kinkala is dominated by astigmatism. Spherical equivalent, hyperopia represents more than 80% of refractive error.
文摘A case series of 4 siblings who had auto-refraction and subjective refraction, refinement was with 0.25 Jackson Cross Cylinder. Presenting complaint was either blurring of distant vision or missing eye glasses. The eldest sibling started using eye glasses at 15 years of age while the other siblings commenced much earlier. Presenting visual acuities in 7 eyes ranged from 6/9 to 6/18, one eye of the eldest sibling had visual acuity of 6/36. Spherical errors had gender bias with the males more likely to be hypermetropic and the females more likely to be myopic. However, cylinder powers and axes were closely related in all siblings. It was concluded that heredo-familial traits could partly account for some of the striking similarities noted in the outcomes of refraction among the siblings.
文摘Purpose: To investigate the efficacy of progressive addition lenses on the treatment of ametropia and loss of accomodation after the single eye's IOL implantation. Methods:.Eighty four patients undergoing IOL implantation in single eyes were prescribed with progressive addition lenses for ametropia correction and regularly followed up to observe subsequent correction effect. Results:.Among these 84 patients,.72 could comfortably adapt to the use of progressive addition lenses to improve visual acuity and accomondation,while the remaining 12 patients failed to accomodate the usage of progressive addition lenses. Conclusion:.Wearing progressive addition lenses acts as a relatively feasible approach to improve visual acuity and alleviate disorders of accomodation for patients who underwent IOL implantation in single eyes..The patients should be prescribed with progressive lenses under professional instructions and guidance.
