Abstract:
PURPOSE:To explore the maximum retinal vasodilation in response to repeated flicker light stimulation in relation to vasospastic propensity in healthy subjects. METHODS:Twenty-four young healthy women were grouped as vasospastic and nonvasospastic, based on their history of cold extremities and on the results of nailfold capillaroscopy. A retinal vessel analyzer was used to obtain recordings of the ocular fundus during still illumination and three flicker light stimulations. Retinal vessels were analyzed in the immediate vicinity of the optic nerve head and 2 to 3 disc diameters away from the disc. The maximum dilatory amplitudes were always the highest 1-second mean vessel diameter in response to each of the three flicker light stimuli. RESULTS:Maximum dilatory amplitude (in percent) was, in the proximal measurement site in the arterioles, 6.2 +/- 2.6, 4.8 +/- 2.1, and 6.6 +/- 3.9 in the vasospastic group, and 7.9 +/- 3.2, 8.6 +/- 4.1, and 9.1 +/- 4.7 in the nonvasospastic group in three repeated flicker stimulations. Corresponding values for distal measurement sites were 6.7 +/- 2.5, 4.8 +/- 3.4, and 4.7 +/- 4.4 and 9.0 +/- 3.7, 11.0 +/- 5.2, and 12.3 +/- 7.7. The maximum amplitude was significantly lower in the vasospastic group (P = 0.001). The maximum venule dilation was also significantly lower in the vasospastic group (P = 0.037). Vessel diameters failed to stabilize at the original baseline level during the 80-second recovery period, and this baseline offset had opposite signs in the arterioles in the vasospastic (remained below the original baseline) and nonvasospastic (remained above the original baseline) groups. CONCLUSIONS:The maximum dilatory amplitude was significantly lower in vessels in the vasospastic group. An augmentation of the maximum vasodilation was observed in the nonvasospastic group after repeated flicker stimulations, a phenomenon that was missing in arterioles of vasospastic subjects. It seems that such different behavior is due to the opposite baseline offsets in interflicker periods in the two groups.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Gugleta K,Zawinka C,Rickenbacher I,Kochkorov A,Katamay R,Flammer J,Orgul Sdoi
10.1167/iovs.06-0351subject
Has Abstractpub_date
2006-09-01 00:00:00pages
4034-41issue
9eissn
0146-0404issn
1552-5783pii
47/9/4034journal_volume
47pub_type
杂志文章abstract::The expression of receptors for Fc portion (FcR) of immunoglobulin G (IgG) and for a C3b component of complement (C3bR) by herpes simplex virus (HSV) was studied in primary cultures of rabbit corneal cells. Monolayer cultures of epithelial, stromal and endothelial cells of the rabbit cornea were infected with three st...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1988-08-01 00:00:00
abstract:PURPOSE:To demonstrate the conjunctival alterations in patients with Sjögren's (SSDE) and non-Sjögren's syndrome dry eye (NSSDE) using a new generation confocal microscope (HRTII/ RCM; Heidelberg Engineering, Heidelberg, Germany), in a prospective controlled study. METHODS:Twenty-eight right eyes of 28 patients with S...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.08-2722
更新日期:2010-01-01 00:00:00
abstract:PURPOSE:To quantitate in vivo retinal ganglion cell (RGC) survival after transient periods of pressure-induced ischemia of the rat retina and after different survival intervals. METHODS:In adult rats, RGCs were labeled with fluorogold applied to their main targets in the brain. Seven days later, in several groups of r...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1996-09-01 00:00:00
abstract:PURPOSE:Invasion of tumor cells into blood vessels is essential for metastasis of uveal melanoma. The occurrence of ingrowth of tumor cells in blood vessels in uveal melanoma was analyzed, and this parameter was compared with the survival of the patients. METHODS:Between 1972 and 2007, 643 eyes primarily enucleated fo...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.09-3824
更新日期:2010-02-01 00:00:00
abstract:PURPOSE:To study the diameter response of retinal arterioles as a function of the arteriolar diameter. METHODS:Ten healthy young volunteers aged 22 to 33 years were subjected to diameter measurement of four successive segments of a retinal arteriole with a retinal vessel analyzer (RVA). At each of the segments, the di...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-0360
更新日期:2007-01-01 00:00:00
abstract:PURPOSE:This study focuses on the identification of regulatory elements that contribute to lens-specific expression of the human CP49 gene within the 5'-flanking DNA sequences. METHODS:The DNA sequence upstream of the human CP49 coding region was subcloned as a set of 5' and 3' deletion series. The constructs were tra...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0162
更新日期:2003-01-01 00:00:00
abstract:PURPOSE:To determine the effect of taxol and etoposide, hydrophobic drugs with antifibrosis activity, on the outcome of filtration surgery in glaucomatous monkeys. METHODS:Elevated intraocular pressure was produced bilaterally in eight cynomolgus monkeys by laser treatment of the trabecular meshwork. Four animals subc...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1993-10-01 00:00:00
abstract:PURPOSE:To examine the relationship between short-wavelength-sensitive (SWS) resolution acuity and epidemiologically defined stages of early age-related maculopathy (ARM). METHODS:Subjects consisted of 88 adults aged 51 to 87 years. Psychophysical testing was undertaken in only one eye of each subject (the study eye)....
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1227
更新日期:2006-10-01 00:00:00
abstract::Growth of the embryonic chick cornea was directly related to, and coordinated with, overall eye growth. During normal development, the size of the embryonic chick cornea increased in three linear phases of diametric growth. Corneal diameter increased at a rate of 216 microns per day between embryonic day 4 (E4) and E7...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1992-11-01 00:00:00
abstract:PURPOSE:We showed previously that single nucleotide polymorphism (SNP) rs662702 in PAX6 may be located in a microRNA-328 binding site that causes susceptibility to high myopia. Our study was done to elucidate the role of PAX6 and its relationship with microRNA-328 in myopia. METHODS:A luciferase assay was used to conf...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-9272
更新日期:2012-05-31 00:00:00
abstract::The neutrophilic response in the alkali-injured rabbit cornea can be separated into two peaks: the first from 12-24 hr and the second at 21 days. In the experiments detailed here, alkali-injured rabbit eyes were treated for 0-7 days (early peak), 6-35 days (late peak), or 0-35 days (both peaks) with 6.5% or 10% topica...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1989-06-01 00:00:00
abstract:Purpose:Intraocular pressure (IOP), the primary risk factor for primary open-angle glaucoma, is determined by resistance to aqueous outflow through the trabecular meshwork (TM). IOP homeostasis relies on TM responses to mechanical stretch. To model the effects of elevated IOP on the TM, this study sought to identify co...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.61.5.2
更新日期:2020-05-11 00:00:00
abstract:PURPOSE:To examine the visual evoked potentials (VEP) and electroretinograms (ERG) generated during electrical stimulation of the human optic nerve using the optic nerve visual prosthesis. METHODS:Two volunteers blind from retinitis pigmentosa (RP) and with no light perception each received a chronically implanted opt...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.09-4346
更新日期:2010-10-01 00:00:00
abstract:PURPOSE:To determine the prevalence of presbyopia in the state of Andhra Pradesh in south India. METHODS:Comprehensive ocular examinations including logMAR (logarithm of the minimum angle of resolution) distance and near (presenting and best corrected) visual acuity, slit lamp biomicroscopy of the anterior segment, an...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1192
更新日期:2006-06-01 00:00:00
abstract::Interactions between direction-selective mechanisms for motion were examined in strabismic and anisometropic amblyopia. Amblyopes were found to have a marked reduction in sensitivity to flicker or movement when the amblyopic eye was presented with a combination of two gratings drifting in opposite directions at the sa...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1980-09-01 00:00:00
abstract:PURPOSE:To identify the risk factors for having advanced glaucomatous visual field loss on the first visit at three hospital eye services. METHODS:This was a hospital-based, case-control study involving patients newly diagnosed with glaucoma at first visit to one of three ophthalmic departments in the United Kingdom. ...
journal_title:Investigative ophthalmology & visual science
pub_type: 临床试验,杂志文章,多中心研究
doi:
更新日期:1999-09-01 00:00:00
abstract:PURPOSE:To measure high-resolution eye-specific displacements and deformations induced within the human LC microstructure by an acute increase in IOP. METHODS:Six eyes from donors aged 23 to 82 were scanned using second harmonic-generated (SHG) imaging at various levels of IOP from 10 to 50 mm Hg. An image registratio...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-12724
更新日期:2014-01-02 00:00:00
abstract:PURPOSE:To determine whether the atmospheric pressure (ATM) change experienced during diving can induce changes in the intraocular pressure (IOP) of eyes in a normal population. METHODS:The IOP of 27 healthy volunteers (ages, 23.8 +/- 4.9 years; range, 18-44) was measured with a Perkins applanation tonometer by two in...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-1578
更新日期:2008-12-01 00:00:00
abstract:PURPOSE:The goal of this study was to functionally evaluate three previously uncharacterized heat shock factor protein 4 (HSF4) mutations (c.595_599delGGGCC, c.1213C>T, c.1327+4A>G) encoding mutant HSF4 proteins (G199EfsX15, R405X, and M419GfsX29) with missing C-terminal ends. These HSF4 mutations were previously ident...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-12283
更新日期:2013-10-11 00:00:00
abstract:PURPOSE:As the number of cases of Acanthamoeba spp. keratitis (AK) is constantly growing, new diagnostic tools are needed to confirm and guide ophthalmologists in this clinically problematic diagnosis. Molecular diagnosis is particularly well adapted, although only a few real-time PCR techniques have been described rec...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8587
更新日期:2012-05-14 00:00:00
abstract:PURPOSE:Previous reports indicated that pregnancy and corneal injury (CI) trigger alterations of lacrimal gland (LG) growth factor expression and redistributions of lymphocytes from periductal foci to acini. The purpose of this study was to test our hypothesis that pregnancy would exacerbate the changes induced by CI. ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-1034
更新日期:2006-04-01 00:00:00
abstract:PURPOSE:Amblyopia is the commonest visual disorder of childhood. Yet the contributions of the two principal treatments (spectacle wear and occlusion) to outcome are unknown. This study was undertaken to investigate the dose-response relationship of amblyopia therapy. METHODS:The study comprised three distinct phases: ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0250
更新日期:2004-09-01 00:00:00
abstract:PURPOSE:To compare accommodative facility in eyes with myopia to that in eyes with emmetropia or hyperopia and to determine whether accommodative facility can be used to predict an association with myopia. METHODS:In the Sydney Myopia Study, year-1 school children (6.7 +/- 0.4 years) were assessed for accommodative fa...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章,多中心研究
doi:10.1167/iovs.05-1078
更新日期:2006-11-01 00:00:00
abstract:PURPOSE:The authors recently showed that the retinal circulation can be accessed by transfemoral endovascular catheterization. The purpose of this study was to examine whether endovascular coiling can be used to induce different degrees of ischemic injury. The possibility of creating occlusions at different sites in th...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-7628
更新日期:2011-07-01 00:00:00
abstract::The histological distribution of R-cognin in chick retinas was determined from embryonic day 8 through 13 wk post-hatching by indirect immunofluorescence using polyclonal anticognin. On embryonic day 8, at a developmental stage without distinct retina layers, most of the cells within the tissue exhibited fluorescence....
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1986-03-01 00:00:00
abstract:PURPOSE:Ion channels in the ciliary epithelium play critical roles in the formation of aqueous humor in the eye. The present study identified a novel, swelling-activated K(+) current in freshly dissociated porcine pigmented ciliary epithelial cells. METHODS:Ciliary epithelial cells were freshly dissociated from porcin...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-7173
更新日期:2011-07-29 00:00:00
abstract:PURPOSE:To determine the influence of specific regions within Lp82 calpain on protein stability, enzymatic activity, and localization within lens and to test the influence of an Lp82 knockout mouse on normal maturational proteolysis in lens. METHODS:DNA constructs for Lp82 and Lp82-related proteins were subcloned into...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-12-01 00:00:00
abstract:Purpose:To assess clinical characteristics, foveal structure, mutation spectrum, and prevalence rate of Åland eye disease (AED)/incomplete congenital stationary night blindness (iCSNB). Methods:A retrospective survey included individuals diagnosed with AED at a national low-vision center from 1980 to 2014. A subset of...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-19445
更新日期:2016-12-01 00:00:00
abstract:PURPOSE:The chemokine receptor CX3CR1 is expressed by monocyte-derived dendritic cells (DCs) and macrophages. CX3CR1 mediates leukocyte migration and adhesion in homeostatic and inflammatory conditions. Mice lacking Cx3cr1 have altered distribution and function of DC subpopulations in some tissue microenvironments. The...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-0953
更新日期:2008-04-01 00:00:00
abstract:PURPOSE:To identify the underlying molecular defects causing retinal degeneration in seven N-ethyl-N-nitrosourea (ENU) induced mutant alleles of the Pde6b gene and to analyze the timescale of retinal degeneration in these new models of retinitis pigmentosa. METHODS:Conformation sensitive capillary electrophoresis and ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.05-0254
更新日期:2005-09-01 00:00:00