U
Usha Chakravarthy
Researcher at Queen's University Belfast
Publications - 425
Citations - 24246
Usha Chakravarthy is an academic researcher from Queen's University Belfast. The author has contributed to research in topics: Macular degeneration & Visual acuity. The author has an hindex of 66, co-authored 398 publications receiving 19331 citations. Previous affiliations of Usha Chakravarthy include University of Illinois at Chicago & Queen's University.
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Journal ArticleDOI
Global Causes of Blindness and Distance Vision Impairment 1990-2020: A Systematic Review and Meta-Analysis
Seth Flaxman,Rupert R A Bourne,Serge Resnikoff,Serge Resnikoff,Peter Ackland,Tasanee Braithwaite,Maria V Cicinelli,Aditi Das,Jost B. Jonas,Jill E Keeffe,John H. Kempen,Janet L Leasher,Hans Limburg,Kovin Naidoo,Kovin Naidoo,Konrad Pesudovs,Alexander J Silvester,Gretchen A Stevens,Nina Tahhan,Nina Tahhan,Tien Yin Wong,Hugh R. Taylor,Rupert R A Bourne,Aries Arditi,Yaniv Barkana,Banu Bozkurt,Alain M. Bron,Donald L. Budenz,Feng Cai,Robert J Casson,Usha Chakravarthy,Jaewan Choi,Maria Vittoria Cicinelli,Nathan Congdon,Reza Dana,Rakhi Dandona,Lalit Dandona,Iva Dekaris,Monte A. Del Monte,Jenny deva,Laura E. Dreer,Leon B. Ellwein,Marcela Frazier,Kevin D. Frick,David S. Friedman,João M. Furtado,H. Gao,Gus Gazzard,Ronnie George,Stephen Gichuhi,Victor H. Gonzalez,Billy R. Hammond,Mary Elizabeth Hartnett,Minguang He,James F. Hejtmancik,Flavio E. Hirai,John J Huang,April D. Ingram,Jonathan C. Javitt,Jost B. Jonas,Charlotte E. Joslin,John H Kempen,Moncef Khairallah,Rohit C Khanna,Judy E. Kim,George N. Lambrou,Van C. Lansingh,Paolo Lanzetta,Jennifer I. Lim,Kaweh Mansouri,Anu A. Mathew,Alan R. Morse,Beatriz Munoz,David C. Musch,Vinay Nangia,Maria Palaiou,Maurizio Battaglia Parodi,Fernando Yaacov Pena,Tunde Peto,Harry A. Quigley,Murugesan Raju,Pradeep Y. Ramulu,Zane Rankin,Dana Reza,Alan L. Robin,Luca Rossetti,Jinan B. Saaddine,Mya Sandar,Janet B. Serle,Tueng T. Shen,Rajesh K. Shetty,Pamela C. Sieving,Juan Carlos Silva,Rita S. Sitorus,Dwight Stambolian,Gretchen Stevens,Hugh Taylor,Jaime Tejedor,James M. Tielsch,Miltiadis K. Tsilimbaris,Jan C. van Meurs,Rohit Varma,Gianni Virgili,Ya Xing Wang,Ningli Wang,Sheila K. West,Peter Wiedemann,Tien Wong,Richard Wormald,Yingfeng Zheng +109 more
TL;DR: A series of regression models were fitted to estimate the proportion of moderate or severe vision impairment and blindness by cause, age, region, and year, and found that world regions varied markedly in the causes of blindness and vision impairment in this age group.
Journal ArticleDOI
Magnitude, temporal trends, and projections of the global prevalence of blindness and distance and near vision impairment: a systematic review and meta-analysis
Rupert R A Bourne,Seth Flaxman,Tasanee Braithwaite,Maria V Cicinelli,Aditi Das,Jost B. Jonas,Jill E Keeffe,John H Kempen,Janet L Leasher,Hans Limburg,Kovin Naidoo,Kovin Naidoo,Konrad Pesudovs,Serge Resnikoff,Serge Resnikoff,Alexander J Silvester,Gretchen A Stevens,Nina Tahhan,Nina Tahhan,Tien Yin Wong,Hugh R. Taylor,Rupert R A Bourne,Peter Ackland,Aries Arditi,Yaniv Barkana,Banu Bozkurt,Alain M. Bron,Donald L. Budenz,Feng Cai,Robert J Casson,Usha Chakravarthy,Jaewan Choi,Maria Vittoria Cicinelli,Nathan Congdon,Reza Dana,Rakhi Dandona,Lalit Dandona,Iva Dekaris,Monte A. Del Monte,Jenny deva,Laura Dreer,Leon B. Ellwein,Marcela Frazier,Kevin D. Frick,David S. Friedman,João M. Furtado,H. Gao,Gus Gazzard,Ronnie George,Stephen Gichuhi,Victor H. Gonzalez,Billy R. Hammond,Mary Elizabeth Hartnett,Minguang He,James F. Hejtmancik,Flavio E. Hirai,John J Huang,April D. Ingram,Jonathan C. Javitt,Jost B. Jonas,Charlotte E. Joslin,John H. Kempen,John H. Kempen,Moncef Khairallah,Rohit C Khanna,Judy E. Kim,George N. Lambrou,Van C. Lansingh,Paolo Lanzetta,Jennifer I. Lim,Kaweh Mansouri,Anu A. Mathew,Alan R. Morse,Beatriz Munoz,David C. Musch,Vinay Nangia,Maria Palaiou,Maurizio Battaglia Parodi,Fernando Yaacov Pena,Tunde Peto,Harry A. Quigley,Murugesan Raju,Pradeep Y. Ramulu,Alan L. Robin,Luca Rossetti,Jinan B. Saaddine,Mya Sandar,Janet B. Serle,Tueng T. Shen,Rajesh K. Shetty,Pamela C. Sieving,Juan Carlos Silva,Rita S. Sitorus,Dwight Stambolian,Gretchen Stevens,Hugh Taylor,Jaime Tejedor,James M. Tielsch,Miltiadis K. Tsilimbaris,Jan C. van Meurs,Rohit Varma,Gianni Virgili,Jimmy Volmink,Ya Xing Wang,Ningli Wang,Sheila K. West,Peter Wiedemann,Tien Wong,Richard Wormald,Yingfeng Zheng +109 more
TL;DR: There is an ongoing reduction in the age-standardised prevalence of blindness and visual impairment, yet the growth and ageing of the world's population is causing a substantial increase in number of people affected, highlighting the need to scale up vision impairment alleviation efforts at all levels.
Journal ArticleDOI
Clinical Classification of Age-related Macular Degeneration
Frederick L. Ferris,Charles P. Wilkinson,Alan C. Bird,Usha Chakravarthy,Emily Y. Chew,Karl G. Csaky,Srinivas R. Sadda +6 more
TL;DR: The proposed basic clinical classification scale seems to be of value in predicting the risk of late AMD, and incorporating consistent nomenclature into the practice patterns of all eye care providers may improve communication and patient care.
Journal ArticleDOI
Ranibizumab versus bevacizumab to treat neovascular age-related macular degeneration: one-year findings from the IVAN randomized trial.
Usha Chakravarthy,Simon P. Harding,Chris A Rogers,Susan M. Downes,Andrew J. Lotery,Sarah Wordsworth,Barnaby C Reeves +6 more
TL;DR: The comparison of visual acuity at 1 year between bevacizumab and ranibizumabs was inconclusive, and other outcomes are consistent with the drugs and treatment regimens having similar efficacy and safety.
Journal ArticleDOI
Proposed lexicon for anatomic landmarks in normal posterior segment spectral-domain optical coherence tomography: the IN•OCT consensus.
TL;DR: An international panel with expertise in retinal imaging was assembled and a nomenclature system for normal anatomic landmarks seen on SD-OCT outputs has been proposed and adopted and recommended for use in future publications.