Abstract：
PURPOSE:Strabismic amblyopia is typically associated with several visual deficits, including loss of contrast sensitivity in the amblyopic eye and abnormal binocular vision. Binocular summation ratios (BSRs) are usually assessed by comparing contrast sensitivity for binocular stimuli (sens(BIN)) with that measured in the good eye alone (sens(GOOD)), giving BSR = sens(BIN)/sens(GOOD). This calculation provides an operational index of clinical binocular function, but does not assess whether neuronal mechanisms for binocular summation of contrast remain intact. This study was conducted to investigate this question. METHODS:Horizontal sine-wave gratings were used as stimuli (3 or 9 cyc/deg; 200 ms), and the conventional method of assessment (above) was compared with one in which the contrast in the amblyopic eye was adjusted (normalized) to equate monocular sensitivities. RESULTS:In nine strabismic amblyopes (mean age, 32 years), the results confirmed that the BSR was close to unity when the conventional method was used (little or no binocular advantage), but increased to approximately radical2 or higher when the normalization method was used. The results were similar to those for normal control subjects (n = 3; mean age, 38 years) and were consistent with the physiological summation of contrast between the eyes. When the normal observers performed the experiments with a neutral-density (ND) filter in front of one eye, their performance was similar to that of the amblyopes in both methods of assessment. CONCLUSIONS:The results indicate that strabismic amblyopes have mechanisms for binocular summation of contrast and that the amblyopic deficits of binocularity can be simulated with an ND filter. The implications of these results for best clinical practice are discussed.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Baker DH,Meese TS,Mansouri B,Hess RFdoi
10.1167/iovs.07-0194subject
Has Abstractpub_date
2007-11-01 00:00:00pages
5332-8issue
11eissn
0146-0404issn
1552-5783pii
48/11/5332journal_volume
48pub_type
杂志文章abstract：PURPOSE:To examine the effects of methylcobalamin on glutamate-induced neurotoxicity in the cultured retinal neurons. METHODS:Primary cultures obtained from the fetal rat retina (gestation days 16 to 19) were used for the experiment. The neurotoxicity was assessed quantitatively using the trypan blue exclusion method....
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1997-04-01 00:00:00
abstract：PURPOSE:To image and analyze anatomical differences at the temporal raphe between normal and glaucomatous eyes using adaptive optics scanning laser ophthalmoscopy (AOSLO) and optical coherence tomography (OCT), and to relate these differences to visual field measurements. METHODS:Nine glaucomatous eyes of 9 patients (...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.15-16730
更新日期：2015-06-01 00:00:00
abstract：PURPOSE:The epidermal growth factor receptor (EGFR) appears in astrocytes after neural injury. The authors' laboratory has reported the presence of EGFR in glaucomatous optic nerves. The activation of EGFR is often associated with induction of cyclooxygenase (COX)-2. In this study, the induction of COX-2 pathway in rat...
journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.04-1473
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abstract：:Cell membranes from the human lens contain two major polypeptides with molecular weights near 26,000 and 22,000. These two species have been isolated in a highly purified state and purified by means of an antiserum against the 26,000 dalton membrane polypeptide from bovine lens. Immunochemical data are presented that ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1981-07-01 00:00:00
abstract：:To compare the effects on the postnatal development of the eye of both total and partial form deprivation in diurnally reared chicks and of dark-rearing, chicks were reared with occluders covering one eye from hatching for up to 6 weeks. In diurnally reared birds, both total and partial form deprivation resulted in se...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1987-08-01 00:00:00
abstract：Purpose:To report molecular genetic findings in six probands with congenital hereditary endothelial dystrophy (CHED) variably associated with hearing loss (also known as Harboyan syndrome). Furthermore, we developed a cellular model to determine if disease-associated variants induce aberrant SLC4A11 pre-mRNA splicing. ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.19-26930
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abstract：:Extracellular matrix (ECM) turnover and remodeling are initiated, at least in part, by the regulated secretion of members of a family of matrix metalloproteinases. Human and bovine trabecular mesh-work in culture secrete interstitial collagenase, both the 72- and the 92-kD forms of type IV collagenase (gelatinases) an...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1991-01-01 00:00:00
abstract：PURPOSE:To describe the psychometric characteristics of the Impact of Vision Impairment (IVI) Profile and evaluate its validity and reliability over time and between different forms of administration. METHODS:The IVI is a 32-item questionnaire developed to measure the impact of vision impairment on restriction of part...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2002-04-01 00:00:00
abstract：:Although the lens has been shown to have the capacity to respond to insulin in vitro, little is known concerning the biochemical relationships of insulin to the lens in vivo. Therefore we have measured insulin in the aqueous humor of rabbits by a sensitive radioimmunoassay after paracentesis and feeding. The insulin c...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1980-12-01 00:00:00
abstract：PURPOSE:To examine the behavior of fibroblasts and retinal pigment epithelial cells after attachment to the retinal surface in vitro to elucidate the pathobiology of the early stages of epiretinal membrane formation. METHODS:Human retinal pigment epithelial (HRPE) cells and bovine Tenon's capsule fibroblasts (BTFs) we...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1997-09-01 00:00:00
abstract：PURPOSE:This study explored the role of the left posterior parietal cortex (PPC) in saccades, vergence, and combined saccade-vergence movements by means of transcranial magnetic stimulation (TMS) in humans. METHODS:TMS was applied over the left PPC for 80, 90, or 100 ms after target onset. In a control experiment, TMS...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.03-1291
更新日期：2004-07-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.09-4874
更新日期：2010-06-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.06-1249
更新日期：2007-11-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.18-24261
更新日期：2018-06-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：2002-05-01 00:00:00
abstract：PURPOSE:To investigate the dynamic effect of tear lipocalins (TLs), the major lipid-binding protein in tears, at aqueous-cornea and lipid-aqueous interfaces, and their potential contribution to surface tension in the tear film. METHODS:Human apo- and holo-TLs were applied to the aqueous subphase in a Langmuir trough, ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1999-12-01 00:00:00
abstract：:A recent hypothesis for the cellular mechanism of fluid secretion by lacrimal acini has been based, in part, on the results of subcellular fractionation analyses of lacrimal gland fragments which had been incubated for a brief period in vitro. An important assumption in those studies was that the ion transporters and ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1990-11-01 00:00:00
abstract：PURPOSE:High concentrations of unconjugated bilirubin are neurotoxic and cause brain damage in newborn infants. However, the exact level of bilirubin that may be neurotoxic in a given infant is unknown. The aim of this study was to use a quantitative measure of neural activity, the swept parameter visual evoked potenti...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.14-14261
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abstract：PURPOSE:The purpose of this study was to assess qualitatively the expression of adhesion molecules by human retinal pigment epithelium (RPE) and to study their regulation by inflammatory cytokines. These molecular events and the role played by inflammatory cytokines are important for selective lymphocyte trafficking in...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1995-10-01 00:00:00
abstract：PURPOSE:To determine the role of IL-33 in resistance to Pseudomonas aeruginosa keratitis. METHODS:Corneal IL-33 mRNA and protein levels were tested in susceptible C57BL/6 (B6) and resistant BALB/c mice. B6 mice were injected with recombinant mouse IL-33 (rmIL-33) and disease severity, bacterial load, polymorphonuclear...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.09-3983
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.06-0890
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.07-1135
更新日期：2008-04-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.10-6266
更新日期：2011-06-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
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doi：10.1167/iovs.09-5126
更新日期：2011-08-05 00:00:00
abstract：:The basal laminae of capillaries, glomeruli, and nerves are thickened in diabetes. Previous studies have shown that diabetic tissues produce increased levels of basal lamina collagen and reduced levels of proteoglycans. Since heparan sulfate and chondroitin sulfate proteoglycans are thought to act as anionic barriers ...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1986-12-01 00:00:00
abstract：PURPOSE:Children with idiopathic infantile nystagmus (IIN) exhibit visual acuity deficits that have been modeled in terms of foveation characteristics of the nystagmus waveform. Here we present evidence for an additional component of acuity loss associated with the deprivation experienced during the sensitive period of...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.13-11992
更新日期：2013-05-01 00:00:00
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journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：
更新日期：1978-09-01 00:00:00
abstract：PURPOSE:To examine gain, speed, and temporal characteristics of initial and closed-loop components of vergence eye movements in young and elderly subjects. METHODS:Vergence eye movements in 13 elderly and 10 young adults were examined. A table with light-emitting diodes was used to elicit vergence starting from near (...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
doi：10.1167/iovs.08-2474
更新日期：2009-03-01 00:00:00
abstract：Purpose:Treatment success in clinical trials for AMD would ideally be aligned to measurable performance in visual tasks rather than imperceptible changes on clinical charts. We test the hypothesis that patients with dry AMD perform worse than visually healthy peers on computer-based surrogates of "real-world" visual se...
journal_title：Investigative ophthalmology & visual science
pub_type： 杂志文章
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更新日期：2017-03-01 00:00:00
