Abstract：
PURPOSE:Visibility of low-spatial frequency stimuli improves when their contrast is modulated at 5 to 10 Hz compared with stationary stimuli. Therefore, temporal modulations of visual objects could enhance the performance of low vision patients who primarily perceive images of low-spatial frequency content. We investigated the effect of retinal-image jitter on word recognition speed and facial emotion recognition in subjects with central visual impairment. METHODS:Word recognition speed and accuracy of facial emotion discrimination were measured in volunteers with AMD under stationary and jittering conditions. Computer-driven and optoelectronic approaches were used to induce retinal-image jitter with duration of 100 or 166 ms and amplitude within the range of 0.5 to 2.6° visual angle. Word recognition speed was also measured for participants with simulated (Bangerter filters) visual impairment. RESULTS:Text jittering markedly enhanced word recognition speed for people with severe visual loss (101 ± 25%), while for those with moderate visual impairment, this effect was weaker (19 ± 9%). The ability of low vision patients to discriminate the facial emotions of jittering images improved by a factor of 2. A prototype of optoelectronic jitter goggles produced similar improvement in facial emotion discrimination. Word recognition speed in participants with simulated visual impairment was enhanced for interjitter intervals over 100 ms and reduced for shorter intervals. CONCLUSIONS:Results suggest that retinal-image jitter with optimal frequency and amplitude is an effective strategy for enhancing visual information processing in the absence of spatial detail. These findings will enable the development of novel tools to improve the quality of life of low vision patients.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Watson LM,Strang NC,Scobie F,Love GD,Seidel D,Manahilov Vdoi
10.1167/iovs.11-9157subject
Has Abstractpub_date
2012-09-06 00:00:00pages
6004-10issue
10eissn
0146-0404issn
1552-5783pii
iovs.11-9157journal_volume
53pub_type
杂志文章abstract：PURPOSE:The production of proinflammatory cytokines and chemokines as well as the surface expression of intercellular adhesion molecule (ICAM)-1 by corneal fibroblasts contribute to corneal inflammation. The effects of triptolide on the expression of these proteins induced by lipopolysaccharide (LPS) in human corneal f...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.06-0319
更新日期：2006-09-01 00:00:00
abstract：:The impact of aging on cell loss in the human retina was examined in foveal and temporal equatorial regions in eyes from 35 donors with ages spanning a 78-yr period from the second to the ninth decade of life. Equatorial cones and retinal pigment epithelial cells (RPE) decreased at uniform rates from the second to the...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1992-01-01 00:00:00
abstract：PURPOSE:To determine whether dexamethasone (DEX)-induced ocular hypertension (OHT) in mice mimics the hallmarks of steroid-induced glaucoma (SIG) in humans, including reduced conventional outflow facility (C), increased extracellular matrix (ECM), and myofibroblasts within the outflow pathway. METHODS:Osmotic mini-pum...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-14429
更新日期：2014-07-15 00:00:00
abstract：PURPOSE:Corneal confocal microscopy is a reiterative, rapid, noninvasive in vivo clinical examination technique capable of imaging corneal nerve fibers. Nerve fiber tortuosity may indicate a degenerative and attempted regenerative response of nerve fibers to diabetes. The purpose of this study was to define alterations...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-0637
更新日期：2004-02-01 00:00:00
abstract：PURPOSE:Microsaccades could indicate the place where our mind is unconsciously focusing, although our gaze is directed elsewhere. Many studies report the importance of microsaccades in visual scene perception, but none of them has addressed their relationship with the perception of a dynamic action and the prediction o...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.15-16880
更新日期：2015-07-01 00:00:00
abstract：:Feline sarcoma virus (FeSV) is a naturally occurring virus that causes spontaneous tumors in cats. The immunologic and morphologic characteristics of these tumors have been studied extensively. It was recently observed in experiments undertaken to induce systemic malignancy with this virus, that severe uveitis and cli...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1983-08-01 00:00:00
abstract：PURPOSE:Anti-vascular endothelial growth factor (anti-VEGF) drugs have dramatically improved the treatment of neovascular AMD. In pivotal studies, almost 90% of patients maintain vision, with approximately 30% showing significant improvement. Despite these successes, 10% to 15% of patients continue to lose vision, even...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.10-6550
更新日期：2011-06-08 00:00:00
abstract：PURPOSE:To assess the range of macular pigment optical density (MPOD) in a healthy group of young adults of South Asian origin; to investigate whether any dietary factors or personal characteristics were related to intersubject variations in MPOD; and to compare the mean MPOD of the South Asian group with the mean MPOD...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.12-10957
更新日期：2013-04-17 00:00:00
abstract：PURPOSE:To test the effect of stimulators of activator protein (AP)-1, on expression of stromelysin (MMP-3) in human TM cells and on aqueous outflow in perfused human anterior segments. METHODS:Change in MMP-3 expression was determined by immunoassay of proMMP-3 levels in the media of cultured human TM cells. Anterior...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.02-0758
更新日期：2003-08-01 00:00:00
abstract：Purpose:Our goal was to describe the clinical and molecular genetic findings in Thai patients with Leber congenital amaurosis (LCA). Methods:Whole exome sequencing (WES) was performed in eight unrelated patients. All genes responsible for inherited retinal diseases (IRDs) based on RetNet were selected for analysis. Po...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.16-21322
更新日期：2017-04-01 00:00:00
abstract：PURPOSE:Recently, a segregation study in families with uveal and cutaneous melanoma identified 9q21 as a potential locus harboring a tumor-suppressor gene (TSG). One of the genes in this area, RASEF, was then analyzed as a candidate TSG, but lack of point mutations and copy number changes could not confirm this. In thi...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.07-1135
更新日期：2008-04-01 00:00:00
abstract：PURPOSE:In uveal melanoma, both tumor size and an inflammatory phenotype have been shown to correlate with a poor clinical prognosis. The purpose of this study was to identify whether inflammatory cytokines were present in the vitreous of eyes with uveal melanoma and to determine whether the vitreal concentration of cy...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.12-10123
更新日期：2012-10-01 00:00:00
abstract：PURPOSE:The purpose of this study was to compare the accommodative performance of the amblyopic eye of children with unilateral amblyopia to that of their nonamblyopic eye, and also to that of children without amblyopia, during both monocular and binocular viewing. METHODS:Modified Nott retinoscopy was used to measure...
journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.14-14948
更新日期：2015-01-27 00:00:00
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.11-9021
更新日期：2012-04-30 00:00:00
abstract：PURPOSE:Pterygia are common, frequently recurring ocular surface lesions characterized by tissue remodeling, cellular proliferation, angiogenesis, and inflammation. The increased incidence of pterygia in persons exposed to excessive solar radiation suggests that ultraviolet (UV) light may play a critical role in the pa...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-0356
更新日期：2003-11-01 00:00:00
abstract：:The ability of human and rabbit ocular tissues to degrade prostaglandins (PGs) was compared by following the metabolic fate of PGF2 alpha. No metabolism was observed in vitro after 5.0 hr incubation with human cornea, iris/ciliary body, or sclera, as indicated by the absence of a decrease in [3H]-PGF2 alpha concentrat...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1990-07-01 00:00:00
abstract：:Alloantigens placed into the anterior chamber of the eye elicit antigen-specific suppression of systemic delayed-type hypersensitivity (DTH) responses and severe impairment of skin allograft rejection. This pattern of immunologic alteration has been termed anterior chamber-associated immune deviation (ACAID) and is th...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1990-10-01 00:00:00
abstract：PURPOSE:To assess vascular endothelial function in patients with normal pressure glaucoma using forearm blood flow responses to intra-arterial infusions of endothelial-dependent and -independent vasoactive agents. METHODS:Eight patients with newly diagnosed and untreated normal pressure glaucoma and eight healthy age-...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1999-07-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
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journal_title：Investigative ophthalmology & visual science
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journal_title：Investigative ophthalmology & visual science
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更新日期：2018-10-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1991-07-01 00:00:00
abstract：PURPOSE:To compare self-assessed driving habits and skills of licensed drivers with central visual loss who use bioptic telescopes to those of age-matched normally sighted drivers, and to examine the association between bioptic drivers' impressions of the quality of their driving and ratings by a "backseat" evaluator. ...
journal_title：Investigative ophthalmology & visual science
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1990-10-01 00:00:00
abstract：PURPOSE:The use of patient-reported outcome (PRO) measures to assess self-reported difficulty in visual activities is common in patients with impaired vision. This study determines the visual and psychosocial factors influencing patients' responses to self-report measures, to aid in understanding what is being measured...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.10-7055
更新日期：2011-07-15 00:00:00
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journal_title：Investigative ophthalmology & visual science
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.14-14940
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1988-08-01 00:00:00
