This editorial in response to the published article titled“Changes in corneal curvature and aberrations after cataract surgery”by Dai,Ruan,and Wang et al.(1)is to reflect back on the evolution of cataract surgery.We...This editorial in response to the published article titled“Changes in corneal curvature and aberrations after cataract surgery”by Dai,Ruan,and Wang et al.(1)is to reflect back on the evolution of cataract surgery.We started with the basic procedure of‘couching’to restore vision in blind eyes caused by mature or hypermature cataracts(2).Next came the procedure of‘intra-capsular cataract removal’with 180°corneo-scleral incision using von-Graefe’s knife,initially without any suture closure of the wound that followed by suturing the wound.Aphakic corrective glasses would suffice to restore‘functional vision’in those early days of cataract surgery.展开更多
In the United States,a patient is‘legally blind’if the best corrected vision in‘both eyes’is 20/200(0.1)or less or the peripheral visual field is less than 20°from the central fixation(1).It could be from adv...In the United States,a patient is‘legally blind’if the best corrected vision in‘both eyes’is 20/200(0.1)or less or the peripheral visual field is less than 20°from the central fixation(1).It could be from advanced glaucoma,opaque cornea,amblyopia,cataract,macular degeneration,severe retinitis pigmentosa,retinal detachment,optic neuritis,conerod dystrophies,and/or chorio-retinal degenerations,etc.Legally blind are considered‘visually handicapped’.While some of these patients are‘functional’in their familiar surroundings,but most lose their‘independence’even in daily life activities.That has detrimental effect on their psychological wellbeing.They feel helpless and burden on their families and the society.展开更多
近年来,通用串行总线(Universal Serial Bus,USB)的使用为家电自动化引入了一种更为简单的实现途径。本文介绍了建立在USB基础之上的、创新的家电自动化应用,并以基于USB的照明控制为例,讲解了基于USB的家电自动化的基础知识。最后,本...近年来,通用串行总线(Universal Serial Bus,USB)的使用为家电自动化引入了一种更为简单的实现途径。本文介绍了建立在USB基础之上的、创新的家电自动化应用,并以基于USB的照明控制为例,讲解了基于USB的家电自动化的基础知识。最后,本文比较了USB和其他用于家电自动化的主流无线技术(如ZigBee通信协议和Bluetooth无线通信协议等)的异同。展开更多
文摘This editorial in response to the published article titled“Changes in corneal curvature and aberrations after cataract surgery”by Dai,Ruan,and Wang et al.(1)is to reflect back on the evolution of cataract surgery.We started with the basic procedure of‘couching’to restore vision in blind eyes caused by mature or hypermature cataracts(2).Next came the procedure of‘intra-capsular cataract removal’with 180°corneo-scleral incision using von-Graefe’s knife,initially without any suture closure of the wound that followed by suturing the wound.Aphakic corrective glasses would suffice to restore‘functional vision’in those early days of cataract surgery.
文摘In the United States,a patient is‘legally blind’if the best corrected vision in‘both eyes’is 20/200(0.1)or less or the peripheral visual field is less than 20°from the central fixation(1).It could be from advanced glaucoma,opaque cornea,amblyopia,cataract,macular degeneration,severe retinitis pigmentosa,retinal detachment,optic neuritis,conerod dystrophies,and/or chorio-retinal degenerations,etc.Legally blind are considered‘visually handicapped’.While some of these patients are‘functional’in their familiar surroundings,but most lose their‘independence’even in daily life activities.That has detrimental effect on their psychological wellbeing.They feel helpless and burden on their families and the society.
文摘近年来,通用串行总线(Universal Serial Bus,USB)的使用为家电自动化引入了一种更为简单的实现途径。本文介绍了建立在USB基础之上的、创新的家电自动化应用,并以基于USB的照明控制为例,讲解了基于USB的家电自动化的基础知识。最后,本文比较了USB和其他用于家电自动化的主流无线技术(如ZigBee通信协议和Bluetooth无线通信协议等)的异同。
