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4.
J Perioper Pract ; 24(9): 210-2, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25326942

RESUMEN

Cataract surgery has evolved greatly over the years, from the ancient practice of 'couching' where the lens is dislodged, to the modern surgical techniques of today. Sir Harold Ridley's invention of the intraocular lens (IOL) has altered the approach towards cataract surgery, benefitting individuals worldwide. This has been his most notable contribution, it is therefore interesting to explore the build up to this event and gain an understanding of the issues faced by Sir Ridley. This paper explores the significant events and key developments that influenced one of the most valuable innovations in the context of cataract surgery--the intraocular lens.


Asunto(s)
Extracción de Catarata/historia , Lentes Intraoculares/historia , Inglaterra , Historia del Siglo XX , Historia del Siglo XXI , Humanos
7.
Dent Hist ; 59(2): 83-6, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25668929

RESUMEN

The collaborative work between dentistry and ophthalmology in developing the osteo-odonto-kerato prosthesis to restore sight in badly damaged eyes.


Asunto(s)
Lentes Intraoculares/historia , Diseño de Prótesis/historia , Historia del Siglo XX , Humanos , Implantación de Lentes Intraoculares/historia , Reino Unido
9.
Rev. cuba. oftalmol ; 23(1)ene.-jun. 2010. graf
Artículo en Español | CUMED | ID: cum-52060

RESUMEN

OBJETIVO: Comparar la efectividad del cálculo del poder dióptrico de la lente intraocular con IOL Master y el método de biometría por aplanación convencional. MÉTODOS: Se seleccionó una muestra de 100 ojos (pacientes) mediante un muestreo simple aleatorio, en el Servicio de Catarata del Centro de Microcirugía Ocular, con diagnóstico de catarata unilateral o bilateral en la consulta preoperatorio, desde marzo hasta septiembre de 2006. Se clasificaron en dos grupos según el método utilizado para el cálculo de la lente intraocular. Se analizaron las variables: longitud axial media preoperatoria, promedio queratométrico preoperatorio, componente esférico esperado y obtenido, agudeza visual sin corrección y mejor agudeza visual corregida preoperatoria y posoperatoria. El análisis estadístico de los resultados se realizó mediante un análisis de varianza, la prueba t de Student de comparación de medias para datos pareados y chi cuadrado. Se utilizó un nivel de confiabilidad de 95 por ciento. RESULTADOS: Entre los principales resultados se encontró que la diferencia de las longitudes axiales entre los métodos IOL Master y biometría por aplanación A-Scan fue estadísticamente significativa. La agudeza visual sin corrección aumentó cuatro líneas y la mejor agudeza visual corregida seis líneas en el posoperatorio de los pacientes del grupo I. El 90 por ciento de los pacientes del grupo I, o sea, los calculados con IOL Master quedaron en la emetropía en cuanto al componente esférico. CONCLUSIONES: Se evidenció una diferencia significativa e inferior a la encontrada en estudios internacionales entre las longitudes axiales preoperatorias halladas mediante los métodos IOL Master y biometría por aplanación; resultaron superiores las calculadas por IOL Master. Se obtuvo ganancia en las líneas de la Cartilla de Snellen tanto de la agudeza visual sin corrección como la mejor agudeza visual corregida en ambos grupos (superior en el grupo II). Predomina ron los resultados refrac...(AU)


OBJECTIVE: to compare the effectiveness of the intraocular lens dioptric power calculation using IOL Master and the conventional applanation biometry. METHODS: A sample of 100 eyes (patients), diagnosed with unilateral or bilateral cataract in the preoperative consultation service, was selected through simple random sampling in the Ocular Microsurgery Center in the period from March to September, 2006. They were divided into two groups based on the method for intraocular lens calculation. The variables were preoperative mean axial length, preoperative keratometric average, expected and obtained spheral component, visual acuity without correction and better corrected visual acuity preoperatively and postoperatively. The statistical analysis of the results was made by variance analysis, Student's t test for paired mean comparisons and Chi square. The confidence level of 95 percent was used. RESULTS: Among the main results, it was found that the axial length differences between IOL Master and A-Scan applanation biometry was statistically significant. Visual acuity without correction increased 4 lines and the best corrected visual acuity increased 6 lines in the postoperative period of the group I patients. Ninety percent of the group I patients, whose visual acuity was calculated with IOL Master, reached emetropia in terms of the spheral component. CONCLUSIONS: A significant difference but lower than that found in the international studies among the preoperative axial lengths calculated through ILO Master and applanation biometry were evinced. The differences were higher in the lenghts calculated by IOL Master. There was improvement in the number of lines of Snellen´s chart both in the visual acuity without correction and the better corrected visual acuity in the two groups; being better in group II. The refractive results tending to emetropy prevailed, taking into consideration the spheral component reached in both groups, which were also higher in group I(AU)


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Microscopía de Interferencia/métodos , Lentes Intraoculares/historia , Biometría/métodos , Estudios Prospectivos
10.
Rev. cuba. oftalmol ; 23(1): 88-99, ene.-jun. 2010.
Artículo en Español | LILACS | ID: lil-584986

RESUMEN

OBJETIVO: Comparar la efectividad del cálculo del poder dióptrico de la lente intraocular con IOL Master y el método de biometría por aplanación convencional. MÉTODOS: Se seleccionó una muestra de 100 ojos (pacientes) mediante un muestreo simple aleatorio, en el Servicio de Catarata del Centro de Microcirugía Ocular, con diagnóstico de catarata unilateral o bilateral en la consulta preoperatorio, desde marzo hasta septiembre de 2006. Se clasificaron en dos grupos según el método utilizado para el cálculo de la lente intraocular. Se analizaron las variables: longitud axial media preoperatoria, promedio queratométrico preoperatorio, componente esférico esperado y obtenido, agudeza visual sin corrección y mejor agudeza visual corregida preoperatoria y posoperatoria. El análisis estadístico de los resultados se realizó mediante un análisis de varianza, la prueba t de Student de comparación de medias para datos pareados y chi cuadrado. Se utilizó un nivel de confiabilidad de 95 por ciento. RESULTADOS: Entre los principales resultados se encontró que la diferencia de las longitudes axiales entre los métodos IOL Master y biometría por aplanación A-Scan fue estadísticamente significativa. La agudeza visual sin corrección aumentó cuatro líneas y la mejor agudeza visual corregida seis líneas en el posoperatorio de los pacientes del grupo I. El 90 por ciento de los pacientes del grupo I, o sea, los calculados con IOL Master quedaron en la emetropía en cuanto al componente esférico. CONCLUSIONES: Se evidenció una diferencia significativa e inferior a la encontrada en estudios internacionales entre las longitudes axiales preoperatorias halladas mediante los métodos IOL Master y biometría por aplanación; resultaron superiores las calculadas por IOL Master. Se obtuvo ganancia en las líneas de la Cartilla de Snellen tanto de la agudeza visual sin corrección como la mejor agudeza visual corregida en ambos grupos (superior en el grupo II). Predomina ron los resultados refrac...


OBJECTIVE: to compare the effectiveness of the intraocular lens dioptric power calculation using IOL Master and the conventional applanation biometry. METHODS: A sample of 100 eyes (patients), diagnosed with unilateral or bilateral cataract in the preoperative consultation service, was selected through simple random sampling in the Ocular Microsurgery Center in the period from March to September, 2006. They were divided into two groups based on the method for intraocular lens calculation. The variables were preoperative mean axial length, preoperative keratometric average, expected and obtained spheral component, visual acuity without correction and better corrected visual acuity preoperatively and postoperatively. The statistical analysis of the results was made by variance analysis, Student's t test for paired mean comparisons and Chi square. The confidence level of 95 percent was used. RESULTS: Among the main results, it was found that the axial length differences between IOL Master and A-Scan applanation biometry was statistically significant. Visual acuity without correction increased 4 lines and the best corrected visual acuity increased 6 lines in the postoperative period of the group I patients. Ninety percent of the group I patients, whose visual acuity was calculated with IOL Master, reached emetropia in terms of the spheral component. CONCLUSIONS: A significant difference but lower than that found in the international studies among the preoperative axial lengths calculated through ILO Master and applanation biometry were evinced. The differences were higher in the lenghts calculated by IOL Master. There was improvement in the number of lines of Snellen´s chart both in the visual acuity without correction and the better corrected visual acuity in the two groups; being better in group II. The refractive results tending to emetropy prevailed, taking into consideration the spheral component reached in both groups, which were also higher in group I


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Biometría/métodos , Lentes Intraoculares/historia , Microscopía de Interferencia/métodos , Estudios Prospectivos
11.
Br J Ophthalmol ; 94(10): 1277-80, 2010 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19828519

RESUMEN

Sir Harold Ridley is recognised today as the inventor of intraocular lens implantation, one the most successful and common procedures in all of surgery. His story, however, is not largely one of triumph and public accolade. This paper reviews Ridley's invention of the intraocular lens and highlights the struggles he faced after his discovery.


Asunto(s)
Extracción de Catarata/historia , Catarata/historia , Implantación de Lentes Intraoculares/historia , Lentes Intraoculares/historia , Actitud del Personal de Salud , Predicción , Historia del Siglo XX , Humanos , Implantación de Lentes Intraoculares/tendencias , Lentes Intraoculares/tendencias
16.
Curr Opin Ophthalmol ; 20(1): 13-8, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19077824

RESUMEN

PURPOSE OF REVIEW: Multifocal and accommodating intraocular lenses (IOLs) were introduced 2 decades ago and have gone through several iterations. This technology has allowed ophthalmologists to provide their cataract surgery patients with a broader range of visual function. The purpose of this article is to discuss the currently available presbyopia-correcting IOLs, the role of patient selection, and future technologies. RECENT FINDINGS: Newer versions of both the multifocal and accommodating IOLs offer better vision at distance, intermediate, and near than their predecessors. The procedure remains attractive for patients with cataracts or those who are too hyperopic for corneal surgery. However, following successful implantation of the latest generation of lenses, some patients are still not completely satisfied with their visual results. Additional procedures, such as yttrium aluminum garnet (YAG) capsulotomies or reduction of astigmatism and refractive error or both, may be required to increase patient satisfaction. SUMMARY: Experience has shown us that the majority of patients who present with cataracts are potential candidates for multifocal or accommodating IOLs. Familiarity with accommodative and multifocal lenses, in conjunction with careful patient selection, maximizes surgical success in this challenging group of surgical patients.


Asunto(s)
Extracción de Catarata , Implantación de Lentes Intraoculares , Lentes Intraoculares , Presbiopía/rehabilitación , Acomodación Ocular , Catarata/complicaciones , Diseño de Equipo , Historia del Siglo XXI , Humanos , Lentes Intraoculares/historia , Lentes Intraoculares/tendencias , Selección de Paciente , Presbiopía/complicaciones , Presbiopía/fisiopatología
18.
Biogr Mem Fellows R Soc ; 53: 285-307, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-18543467

RESUMEN

Sir Harold Ridley invented and refined the modern miracle of replacing lenses obscured by cataracts with plastic optical lenses, thus rendering a complete cataract cure. This operation, broadly termed the cataract-intraocular lens (IOL) operation, has since brought sight to many millions of people throughout the world, and continues to improve the quality of life of more than 10 million patients worldwide each year. Ridley not only launched this powerful and irreversible forward movement in the field of ophthalmology and the visual sciences, but through it he also helped give birth to the exciting and new field of artificial biodevice implantation as well as transplantation techniques now applied to many other organs and tissues of the body. He has therefore been credited with healing to create the relatively new specialty of biomedical engineering. Few of the millions of patients worldwide who now enjoy the benefits of the modern cataract - IOL operation are aware of the origin of this innovation. Indeed, few eye care professionals - even ophthalmic surgeons who implant them almost daily - are aware of the origin of the IOL - an invention that, as Harold himself liked to say, 'cured aphakia'. (The word aphakia comes from teh Greek, meaning absence of lens, the situation that occurs when a cataractous lens is surgically removed.)


Asunto(s)
Afaquia , Extracción de Catarata/historia , Extracción de Catarata/instrumentación , Extracción de Catarata/métodos , Catarata/historia , Lentes Intraoculares/historia , Oftalmología , Medicina Aeroespacial/historia , Ambliopía/dietoterapia , Ambliopía/etiología , Ambliopía/historia , Afaquia/historia , Afaquia/cirugía , Catarata/terapia , Extracción de Catarata/estadística & datos numéricos , Ghana , Historia del Siglo XX , Lentes Intraoculares/estadística & datos numéricos , Lentes Intraoculares/tendencias , Medicina Militar/historia , Medicina Militar/métodos , Mianmar , Oncocercosis Ocular/historia , Oncocercosis Ocular/terapia , Oftalmología/historia , Investigación/historia , Proyectos de Investigación , Segunda Guerra Mundial
20.
J Cataract Refract Surg ; 32(5): 849-58, 2006 May.
Artículo en Inglés | MEDLINE | ID: mdl-16765805

RESUMEN

The ReSTOR intraocular lens presents a unique apodized diffractive design within a refractive foldable acrylic optic, which makes an unprecedented level of mulifocal optical performance available. We describe the history and principles of diffractive optics used in the development of this refractive-diffractive IOL.


Asunto(s)
Lentes Intraoculares/historia , Óptica y Fotónica/historia , Extracción de Catarata/historia , Historia del Siglo XIX , Historia del Siglo XX , Historia del Siglo XXI , Humanos , Implantación de Lentes Intraoculares/historia , Diseño de Prótesis/historia
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