Results 251 to 260 of about 39,754 (298)
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Advances in perimetry for glaucoma
Current Opinion in Ophthalmology, 2021Purpose of review Perimetry remains important for the diagnosis and management of glaucoma despite advances in imaging technology. The purpose of this review is to describe advances in the acquisition and analysis of visual field data and highlight novel
Alisa J. Prager, J. Kang, A. Tanna
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International Ophthalmology Clinics, 1977
Luminance measurements of targets and backgrounds revealed differences for various types of perimetric instruments. A lack of uniform testing conditions for instruments of the same design was also noted. Of the instruments measured, hemispheric-projection perimeters seemed to provide the most repeatable test conditions.
J P, Schoessler, C A, Uniacke
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Luminance measurements of targets and backgrounds revealed differences for various types of perimetric instruments. A lack of uniform testing conditions for instruments of the same design was also noted. Of the instruments measured, hemispheric-projection perimeters seemed to provide the most repeatable test conditions.
J P, Schoessler, C A, Uniacke
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Optometry and Vision Science, 1978
The history, theory, and practical application of automated perimetry are discussed. Optometrists are urged to consider increasing the efficiency of their examination procedures by using automated field testing--in particular, automated perimetry.
D A, Springer, L J, Alexander
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The history, theory, and practical application of automated perimetry are discussed. Optometrists are urged to consider increasing the efficiency of their examination procedures by using automated field testing--in particular, automated perimetry.
D A, Springer, L J, Alexander
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Threshold versus intensity functions in two‐colour automated perimetry
Ophthalmic & physiological optics, 2020Two‐colour computerised perimetry is a technique developed for assessing cone‐ and rod‐function at fixed background luminances in retinal disease. However, the state of adaptation during testing is unknown but crucial in the interpretation of results. We
M. Simunovic +3 more
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Archives of Ophthalmology, 1976
Seven subjects were studied to determine the reproducibility of color isopters utilizing a Tubingen perimeter with targets equated for radiant energy and separate for heterochromatic flicker luminance. Achromatic threshold recognition of targets for equal luminance gave smaller isopters with longer wavelengths (red).
T J, Carlow, J T, Flynn, T, Shipley
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Seven subjects were studied to determine the reproducibility of color isopters utilizing a Tubingen perimeter with targets equated for radiant energy and separate for heterochromatic flicker luminance. Achromatic threshold recognition of targets for equal luminance gave smaller isopters with longer wavelengths (red).
T J, Carlow, J T, Flynn, T, Shipley
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Ophthalmology Clinics of North America, 2003
As distinguished from measuring the ability to see at the location where the eye's gaze is fixated, perimetry consists of determining the visual capabilities throughout the field of vision. Traditionally the ability to see a white object or a projected spot of white light is determined and quantified under standard conditions.
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As distinguished from measuring the ability to see at the location where the eye's gaze is fixated, perimetry consists of determining the visual capabilities throughout the field of vision. Traditionally the ability to see a white object or a projected spot of white light is determined and quantified under standard conditions.
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Virtual reality headsets for perimetry testing: a systematic review
Eye, 2023K. Selvan +5 more
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Acta Ophthalmologica, 1986
Abstract A large absolute paracentral ring scotoma was found in both eyes of a 60‐year‐old woman with progressive cone dysfunction but with normal rod function using for the perimetry a white tangential screen of 200 cd/m2 luminance and a 632 nm laser test light.
V, Elenius, M, Leinonen
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Abstract A large absolute paracentral ring scotoma was found in both eyes of a 60‐year‐old woman with progressive cone dysfunction but with normal rod function using for the perimetry a white tangential screen of 200 cd/m2 luminance and a 632 nm laser test light.
V, Elenius, M, Leinonen
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Acta Ophthalmologica, 1976
In static perimetry the method of limits is widely used for threshold determinations. Its performance is compared with that of a certain modification of the staircase method (repetitive up and down method) by means of simulations, where the behaviour of the observer is described by an assumed psychometric function.
H, Bebie, F, Fankhauser, J, Spahr
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In static perimetry the method of limits is widely used for threshold determinations. Its performance is compared with that of a certain modification of the staircase method (repetitive up and down method) by means of simulations, where the behaviour of the observer is described by an assumed psychometric function.
H, Bebie, F, Fankhauser, J, Spahr
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Ophthalmology, 1985
This study presents a preliminary comparison of six commercially-available automated threshold static parameters, consisting of three projection perimeters (Humphrey Field Analyzer, Squid, and Octopus 500) and three light-emitting diode (LED) perimeters (Dicon 2000, Fieldmaster 50, and Digilab 350).
J L, Keltner, C A, Johnson, R A, Lewis
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This study presents a preliminary comparison of six commercially-available automated threshold static parameters, consisting of three projection perimeters (Humphrey Field Analyzer, Squid, and Octopus 500) and three light-emitting diode (LED) perimeters (Dicon 2000, Fieldmaster 50, and Digilab 350).
J L, Keltner, C A, Johnson, R A, Lewis
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