Results 291 to 300 of about 354,589 (350)
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Archives of Ophthalmology, 1985
To the Editor. —Visual acuity measurement is the most important single test used in ophthalmology. A large variety of visual acuity charts are available, differing in the language, choice of letters, or geometric shapes. With the development of the International Chart in 1909 and the multiple revisions by the International Council of Ophthalmology, 1 ...
A M, Mansour, J B, Walsh
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To the Editor. —Visual acuity measurement is the most important single test used in ophthalmology. A large variety of visual acuity charts are available, differing in the language, choice of letters, or geometric shapes. With the development of the International Chart in 1909 and the multiple revisions by the International Council of Ophthalmology, 1 ...
A M, Mansour, J B, Walsh
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Archives of Ophthalmology, 1966
Since the classical work of Wertheim1there have been many studies of peripheral visual acuity. Those published prior to 1951 were thoroughly reviewed by Low.2Data from representative investigations are shown in Fig 1. Only two studies provide any information as to the variability of normal acuity at each eccentric location.
H G, Randall, D J, Brown, L L, Sloan
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Since the classical work of Wertheim1there have been many studies of peripheral visual acuity. Those published prior to 1951 were thoroughly reviewed by Low.2Data from representative investigations are shown in Fig 1. Only two studies provide any information as to the variability of normal acuity at each eccentric location.
H G, Randall, D J, Brown, L L, Sloan
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Science, 1976
Grating acuity, the ability to resolve high-contrast square-wave gratings, was measured in a falcon and in humans under comparable conditions. This behavioral test of falcon acuity supports the common belief that Falconiformes have superb vision—the falcon's threshold was 160 cycles per degree, while the human thresholds were 60 cycles per degree ...
R, Fox, S W, Lehmkuhle, D H, Westendorf
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Grating acuity, the ability to resolve high-contrast square-wave gratings, was measured in a falcon and in humans under comparable conditions. This behavioral test of falcon acuity supports the common belief that Falconiformes have superb vision—the falcon's threshold was 160 cycles per degree, while the human thresholds were 60 cycles per degree ...
R, Fox, S W, Lehmkuhle, D H, Westendorf
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Nature, 1947
MOST published researches on visual acuity have assumed an unrestricted time of observation, but recent studies of the relations between intensity discrimination and acuity, and photo-chemical theories thereof, have indicated that the wandering of fixation plays an important part in the performance of the visual system.
L C, MARTIN, W, KANIOWSKI
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MOST published researches on visual acuity have assumed an unrestricted time of observation, but recent studies of the relations between intensity discrimination and acuity, and photo-chemical theories thereof, have indicated that the wandering of fixation plays an important part in the performance of the visual system.
L C, MARTIN, W, KANIOWSKI
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Archives of Ophthalmology, 1951
PERIPHERAL visual acuity has been the subject of speculation since ancient times and in the last 100 years has been measured quantitatively by numerous investigators. The purpose of this paper is to survey the present status of knowledge in this field. A short historical sketch is followed by the presentation of quantitative data.
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PERIPHERAL visual acuity has been the subject of speculation since ancient times and in the last 100 years has been measured quantitatively by numerous investigators. The purpose of this paper is to survey the present status of knowledge in this field. A short historical sketch is followed by the presentation of quantitative data.
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2014
The Enhancing Visual Acuity (EVA) System (Dutch Ophthalmic Research Centre International B.V.) features a unique fluid control system - VacuFlow Valve Timing Intelligence (VTi®) - and represents the next-generation evolution of pump machines. VacuFlow VTi® overcomes the limitations of existing Venturi and peristaltic pumps and provides the potential to
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The Enhancing Visual Acuity (EVA) System (Dutch Ophthalmic Research Centre International B.V.) features a unique fluid control system - VacuFlow Valve Timing Intelligence (VTi®) - and represents the next-generation evolution of pump machines. VacuFlow VTi® overcomes the limitations of existing Venturi and peristaltic pumps and provides the potential to
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Partial recovery of visual function in a blind patient after optogenetic therapy
Nature Medicine, 2021J-A Sahel, Chloé Pagot, Angelo Arleo
exaly