Frequency doubling technology perimetry for the detection of glaucomatous visual field loss.

Published on Mar 1, 2000in American Journal of Ophthalmology5.258
路 DOI :10.1016/S0002-9394(00)00352-4
Wallace L.M. Alward59
Estimated H-index: 59
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Abstract
Recording and erasing optical information can be done by using an alloy film capable of forming two stable crystalline states differing in crystal texture and optical characteristics by being irradiated with optical energies under different conditions. The memory film includes 35-45 atom % of Indium (In) and 55-65 atom % of antimony (Sb).
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#1Yochanan Burnstein (UMB: University of Maryland, Baltimore)H-Index: 2
#2Nancy J. Ellish (UMB: University of Maryland, Baltimore)H-Index: 15
Last. Eve J. Higginbotham (UMB: University of Maryland, Baltimore)H-Index: 32
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Abstract PURPOSE: To determine the sensitivity and specificity of frequency doubling perimetry with Humphrey visual field testing used as the gold standard. METHODS: Frequency doubling perimetry and Humphrey visual field testing (24-2) were performed on 29 consecutive patients in a glaucoma practice. Data for the right eye were used to calculate sensitivity, specificity, and receiver operating characteristic curves. RESULTS: For the frequency doubling perimetry in screening mode, and with an abn...
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#1Santosh C. Patel (Greater Baltimore Medical Center)H-Index: 2
#2David S. Friedman (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 94
Last. Alan L. RobinH-Index: 63
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Abstract PURPOSE: To evaluate an algorithm for the identification of glaucomatous visual field defects with the screening mode of frequency doubling technology. METHODS: Screening-mode frequency doubling technology and Swedish interactive threshold algorithm perimetry were performed on 137 of 150 consecutive patients referred to a glaucoma specialist. We created an algorithm for the frequency doubling technology that gave increased importance to both more severe defects and defects closer to fix...
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#1Kimberly E. Cello (UC Davis: University of California, Davis)H-Index: 14
#2Jacqueline M. Nelson-Quigg (UC Davis: University of California, Davis)H-Index: 4
Last. Chris A. JohnsonH-Index: 77
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PURPOSE: To evaluate the ability of frequency doubling technology perimetry to detect early, moderate, and advanced glaucomatous visual field loss. METHODS: In a prospective study, frequency doubling technology perimetry (C-20 full threshold) was performed in the right eye of 254 normal control subjects and 230 patients with early (n = 85), moderate (n = 114), or advanced (n = 31) glaucomatous visual field loss. Previous Humphrey Field Analyzer test results were used to classify glaucomatous vis...
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#1Chris A. JohnsonH-Index: 77
#2George A. CioffiH-Index: 43
Last. E M Van BuskirkH-Index: 17
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ABSTRACT:Purpose.To assess whether smaller targets and a 24-2 stimulus presentation pattern would improve the ability of frequency doubling technology (FDT) perimetry to detect and characterize early glaucomatous visual field loss.Methods.One hundred normal subjects between the ages of 20 and 85 par
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#1Harry A. Quigley (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 131
AIM: To estimate the prevalence of glaucoma among people worldwide. METHODS: Available published data on glaucoma prevalence were reviewed to determine the relation of open angle and angle closure glaucoma with age in people of European, African, and Asian origin. A comparison was made with estimated world population data for the year 2000. RESULTS: The number of people with primary glaucoma in the world by the year 2000 is estimated at nearly 66.8 million, with 6.7 million suffering from bilate...
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#1Michael Wall (UI: University of Iowa)H-Index: 57
#2Kathryn M. Ketoff (UI: University of Iowa)H-Index: 1
Purpose To determine whether patients with primary open-angle glaucoma have an increase in size thresholds, prolongation of reaction times, and greater localization errors to random dot motion stimuli than normal subjects. Methods Motion perimetry, a computer graphics method of visual field testing, quantitates a subject's ability to detect a correlated shift in position of dots within a defined circular area against a background of fixed dots. We measured motion thresholds, the smallest detecta...
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#1Chris A. Johnson (UC Davis: University of California, Davis)H-Index: 77
#2Anthony J. Adams (University of California, Berkeley)H-Index: 56
Last. James D. Brandt (Vision-Sciences, Inc.)H-Index: 49
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鈥 Objective. 鈥擳he purpose of this investigation was to determine whether blue-on-yellow (B/Y) perimetry is capable of predicting the onset and location of impending glaucomatous visual field loss in patients with ocular hypertension. Design. 鈥擜 Humphrey Field Analyzer (Humphrey Instruments, San Leandro, Calif) was modified to perform B/Y perimetry to isolate and measure the sensitivity of short-wavelength鈥攕ensitive mechanisms. Participants were tested annually with standard white-on-white (W/W) ...
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Summary-!. Two psychophysical tests to assess retinal function in ocular hypertension and glaucoma are described. The basis for these tests is the frequency-doubled percept seen with rapid temporal modulation of the contrast of very low spatial frequencies. 2. The results of the second set of experiments show correlation (P < 0.01) with optic disc cupping. Without the inclusion of information about subjects' optic disc condition the second experimental procedure distinguishes the test group from...
#1Harry A. Quigley (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 131
#2Gregory R. Dunkelberger (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 3
Last. W. Richard Green (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 85
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Abstract Eighteen eyes of 12 persons with chronically elevated intraocular pressure (IOP) were studied histologically to determine the number and diameter of optic nerve fibers. In some eyes, automated perimetry had been performed. Optic nerve fibers larger than the mean diameter were killed more rapidly than smaller fibers, although no fiber size was completely spared at any stage of atrophy. The number of optic nerve fibers varies considerably among normal eyes. The authors confirmed that the ...
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#1David M. Eddy (Duke University)H-Index: 69
#2Lauri E. Sanders (Duke University)H-Index: 1
Last. Judy F. Eddy (Duke University)H-Index: 2
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Abstract This paper estimates the value of performing Schiotz tonometry to detect glaucoma in an asymptomatic patient. About 9% of adults over 40 will be found on a single Schiotz tonometry test to have elevated intraocular pressure (IOP). On work-up, about 1 out of 50 of these individuals with high IOP will be found to have glaucoma. Tonometry, however, will miss about half of all patients with glaucoma because they do not have elevated IOPs at the time of the test. Pilocarpine or epinephrine a...
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Cited By39
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#1Karam Alawa (UM: University of Miami)H-Index: 7
#2Ryan P. Nolan (UM: University of Miami)H-Index: 1
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Background Current visual field screening machines are bulky and expensive, limiting their accessibility, affordability and use. We report the design and evaluation of a novel, portable, cost-effective system for glaucoma screening using smartphone-based visual field screening using frequency doubling technology (FDT) and a head-mounted display. Methods Nineteen eyes of 10 subjects with new-onset or chronic primary open angle glaucoma were tested and compared with the Humphrey Zeiss FDT and the ...
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#1Kyoung In Jung (Catholic University of Korea)H-Index: 13
#2Hee Kyung Ryu (Catholic University of Korea)H-Index: 1
Last. Chan Kee Park (Catholic University of Korea)H-Index: 28
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Using either 24-2 or 10-2 visual field (VF) testing only is not enough to cover all the various types of glaucomatous VF defects. We investigated the performance of the combined 24-2 and 10-2 perimetry when conducted together and separately using the structure-function relationship. A total of 30 glaucoma patients with isolated peripheral nasal step, 37 patients with isolated paracentral scotoma, and 38 patients with both paracentral and nasal scotoma were included. To create the combined Humphr...
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#1Lukas Mees (Johns Hopkins University)H-Index: 1
#2Swati Upadhyaya (Aravind Eye Hospital)H-Index: 3
Last. Rengaraj Venkatesh (Aravind Eye Hospital)H-Index: 22
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PReCIS:: The C3 fields analyzer (CFA) is a moderately reliable perimeter preferred by patients to standard perimetry. While it does not approximate the gold standard, it was sensitive and specific for clinically defined glaucoma (area under the receiving operator characteristic curve=0.77 to 0.86). PURPOSE: Testing the visual field is a vital sign for diagnosing and managing glaucoma. The current gold standard, the Humphrey visual field analyzer (HFA), is large, expensive and can be uncomfortabl...
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#1Angela MorejonH-Index: 2
Last. Fernando UssaH-Index: 8
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Purpose: The purpose of this study was to develop an objective algorithm to discriminate the earliest stages of glaucoma using frequency doubling technology (FDT) Matrix perimetry and spectral domain-optical coherence tomography (OCT) technology to improve primary care detection. Materials and methods: Three hundred six eyes (mean age 58.67卤15.12) from 161 patients were included and classified in the following three groups: 101 nonglaucoma (GI-NG), 100 glaucoma suspect (GII-SG), and 105 open-ang...
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#1Takashi Wada (Jikei University School of Medicine)H-Index: 1
#2Tadashi Nakano (Jikei University School of Medicine)H-Index: 1
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#1Konstantinos T. Tsaousis (RMIT: RMIT University)H-Index: 14
#2Sotiris PlainisH-Index: 20
Last. Efstathios T. DetorakisH-Index: 23
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BACKGROUND:: The aim of the present study was to investigate the value of pattern visual-evoked potentials (pVEP) and pattern electroretinograms (pERG) in early glaucoma diagnosis. MATERIALS AND METHODS:: Thirty-eight eyes of 38 patients were included. Patients were classified into normal control (NC) and glaucoma patient (GP) groups. Patients underwent a detailed clinical ophthalmic examination and an electrodiagnostic examination using steady-state pVEP and pERG. Differences between groups in ...
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The functional assessment of patients with primary open angle glaucoma (POAG) is important both for quantifying glaucomatous damage and for providing the clinician with an indication of the level of visual impairment from glaucoma. In its commonest form, perimetry is carried out using automated computerised techniques to bracket visual sensitivity (differential light sensitivity, DLS) at multiple test locations. Test parameters for contemporary standard automated perimetry (SAP) have largely bee...
#1Wadih M. Zein (Children's National Medical Center)H-Index: 5
#2Ziad F. Bashshur (AUB: American University of Beirut)H-Index: 18
Last. Baha鈥 N. Noureddin (AUB: American University of Beirut)H-Index: 14
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To test the ability of frequency doubling technology (FDT) perimetry to reveal defects in the same field quadrants as detected by standard automated perimetry (SAP). Ninety-two eyes with open-angle glaucoma and documented visual field defects by threshold SAP (Octopus Dynamic strategy) also underwent threshold FDT testing after successfully passing the FDT screening test. All eyes revealed varying stages of SAP defects while only 80 revealed FDT damage: 31:21 eyes in the early field loss stage, ...
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#1Jemaima Che Hamzah (UPenn: University of Pennsylvania)H-Index: 5
Glaucoma is characterized by a typical appearance of the optic disc and peripheral visual field loss. However, diagnosis may be challenging even for an experienced clinician due to wide variability among normal and glaucomatous eyes. Standard automated perimetry is routinely used to establish the diagnosis of glaucoma. However, there is evidence that substantial retinal ganglion cell damage may occur in glaucoma before visual field defects are seen. The introduction of newer imaging devices such...
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PURPOSE: To compare the effect of an apodized diffractive intraocular lens (IOL) (Acrysof ReSTOR NaturalTM) and its yellow counterpart (Natural IQTM) on frequency doubling technology (FDT) perimetry results. METHODS: This study included 37 eyes from 22 patients at the "Centro Oftalmologico Tranjan" who had undergone uncomplicated phacoemulsification and intraocular lens implantation (17 Acrysof ReSTOR NaturalTM, 20 Natural IQTM) performed by the same surgeon, at least three months prior to the s...
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