Abstract:
PURPOSE:To evaluate the feasibility and reliability of a standardized approach for quantitative measurements of fundus autofluorescence (AF) in images obtained with a confocal scanning laser ophthalmoscope (cSLO). METHODS:AF images (30°) were acquired in 34 normal subjects (age range, 20-55 years) with two different cSLOs (488-nm excitation) equipped with an internal fluorescent reference to account for variable laser power and detector sensitivity. The gray levels (GLs) of each image were calibrated to the reference, the zero GL, and the magnification, to give quantified autofluorescence (qAF). Images from subjects and fixed patterns were used to test detector linearity with respect to fluorescence intensity, the stability of qAF with change in detector gain, field uniformity, effect of refractive error, and repeatability. RESULTS:qAF was independent of detector gain and laser power over clinically relevant ranges, provided that detector gain was adjusted to maintain exposures within the linear detection range (GL < 175). Field uniformity was better than 5% in a central 20°-diameter circle but decreased more peripherally. The theoretical inverse square magnification correction was experimentally verified. Photoreceptor bleaching for at least 20 seconds was performed. Repeatability (95% confidence interval) for same day and different-day retests of qAF was ±6% to ±14%. Agreement (95% confidence interval) between the two instruments was <11%. CONCLUSIONS:Quantitative AF imaging appears feasible. It may enhance understanding of retinal degeneration, serve as a diagnostic aid and as a sensitive marker of disease progression, and provide a tool to monitor the effects of therapeutic interventions.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Delori F,Greenberg JP,Woods RL,Fischer J,Duncker T,Sparrow J,Smith RTdoi
10.1167/iovs.11-8319subject
Has Abstractpub_date
2011-12-09 00:00:00pages
9379-90issue
13eissn
0146-0404issn
1552-5783pii
iovs.11-8319journal_volume
52pub_type
杂志文章abstract:PURPOSE:To characterize the reactions of retinal glial cells (astrocytes and Müller cells) to retinal injury in mice that lack glial fibrillary acidic protein (GFAP) and vimentin (GFAP-/-Vim-/-) and to determine the role of glial cells in retinal detachment (RD)-induced photoreceptor degeneration. METHODS:RD was induc...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-1398
更新日期:2007-06-01 00:00:00
abstract:PURPOSE:To study the spatial distribution of posterior pole choroidal thickness (CT) in healthy eyes using spectral domain optical coherence tomography (SD-OCT). METHODS:Fifty-nine eyes from 30 subjects with no retinal or choroidal disease were examined with high-definition (HD) OCT using macular volume cube scanning ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-8046
更新日期:2011-09-01 00:00:00
abstract:Purpose:To examine the early glial reactivity and neuron damage in response to short-term cerebrospinal fluid pressure (CSFp) reduction, as compared with intraocular pressure (IOP) elevation. Methods:The experiment included 54 male Sprague-Dawley rats with elevated translaminar cribrosa pressure difference (TLPD), def...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-22232
更新日期:2018-07-02 00:00:00
abstract:Purpose:To investigate the action of atropine on global flash multifocal electroretinogram (gmfERG) responses to retinal defocus. Method:gmfERG recordings were made monocularly in 19 healthy adults under three lens-imposed defocus conditions (2 diopters myopic, 2 diopters hyperopic, and no defocus) before and 24 hours...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.18-24600
更新日期:2019-01-02 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-12650
更新日期:2013-11-21 00:00:00
abstract:PURPOSE:To determine the size variation of the X-chromosomal human red and green visual pigment gene array in the general population using pulsed field gel electrophoresis and Southern blotting. METHODS:Peripheral blood lymphocytes were prepared from 67 anonymous males. The cells were embedded in agarose and the genom...
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 determine the role of the small guanosine triphosphate (GTP)-binding protein Rho in the migration of corneal epithelial cells. METHODS:The presence of the Rho target proteins Rho-associated coiled coil-containing protein kinase (ROCK)-1 and ROCK-2 in rabbit cornea was examined by immunohistochemical analysi...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract:PURPOSE:The anterior surface of the eye is covered by several physically contiguous but histologically distinguishable epithelial overlying the cornea, limbus, bulbar conjunctiva, fornix conjunctiva, and palpebral conjunctiva. It is important to determine whether the different phenotypes of these epithelia are the resu...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1993-04-01 00:00:00
abstract:PURPOSE:Macular pigment (MP) may protect against age-related macular degeneration. This study was conducted to determine the extent of changes in the macular pigment density as a consequence of oral supplementation with lutein. A second purpose was to compare two objective measurement techniques. METHODS:In the first ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-10-01 00:00:00
abstract:PURPOSE:Folic acid is essential for DNA, RNA, and protein synthesis, and deficiencies in folate can lead to nutritional amblyopia and optic neuropathy. The transport of folate from the choroidal blood supply to the retina is only now beginning to be understood. The reduced-folate transporter was reported recently to be...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00
abstract:PURPOSE:To examine the expression pattern and roles of Sonic hedgehog (Shh) in healing corneal epithelium. METHODS:Immunofluorescent staining and Western blot analysis were used to detect Shh, patched 1 (Ptc 1) receptors, and Gli transcription factors in corneal epithelium of Wistar rats (n = 44) at various intervals ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0001
更新日期:2004-08-01 00:00:00
abstract:PURPOSE:Chemokine signaling and monocytes/macrophages were implicated in the pathogenesis of AMD. We tested the association between chemokines involved in monocyte recruitment and AMD. METHODS:Immunophenotyping for white blood cell (WBC) populations including CD14++CD16- and CD14+CD16+ monocytes, CD19+, CD3+, and CD16...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.11-9165
更新日期:2012-08-07 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-09-01 00:00:00
abstract:PURPOSE:Scleral proteoglycans were characterized from human donor eyes aged 2 months to 94 years to identify age-related changes in the synthesis and/or accumulation of these extracellular matrix components. METHODS:Newly synthesized proteoglycans (previously radiolabeled with 35SO4) and total accumulated scleral prot...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-06-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.07-0179
更新日期:2007-09-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-12833
更新日期:2014-03-25 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.17-21535
更新日期:2017-08-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-20078
更新日期:2016-10-01 00:00:00
abstract:PURPOSE:To map the spatiotemporal decline in retinally driven activity in the superior colliculus (SC) of transgenic S334ter-line-3 rats that express a mutated rhodopsin, which causes photoreceptor degeneration. To determine whether transplantation of fetal retinal sheets into the subretinal space of these rats can rec...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.02-0615
更新日期:2003-04-01 00:00:00
abstract:PURPOSE:To investigate the effects of reducing connexin (Cx) diversity in the lens when the amount of connexin protein is nearly constant. METHODS:Lenses in which the Cx50 coding region was replaced by that of Cx46 (knockin [KI]), were compared with wild type (WT) and Cx50-knockout (KO) lenses. Gap junctional conducta...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0445
更新日期:2004-10-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.18-24635
更新日期:2018-07-02 00:00:00
abstract:PURPOSE:To examine the signal transduction pathways involved in the activation of orbital fibroblast effector functions relevant to the pathogenesis of Graves' ophthalmopathy (GO). To determine, using antisense technology, whether the c-myc protooncogene is involved in cell proliferation and glycosaminoglycan (GAG) syn...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1995-06-01 00:00:00
abstract:PURPOSE:This study aims to determine the in vivo effectiveness of low-frequency ultrasound in mediating the transport of macromolecules to the posterior segment of the eye via transscleral route. It investigates if damage is caused by ultrasound at the tested operation parameters on the posterior ocular tissues and vis...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-11978
更新日期:2013-06-26 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::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:To present a detailed phenotypic and molecular study of a series of 18 patients from 11 families with retinal dystrophies consequent on mutations in the cone-rod homeobox (CRX) gene and to report a novel phenotype. METHODS:Families were ascertained from a tertiary clinic in the United Kingdom and enrolled into...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-14715
更新日期:2014-09-30 00:00:00
abstract::In orbital exenteration specimens from 14 rats, 93% of the mast cells were found in the lids, the limbus, and the conjunctiva, 5% in the orbital tissues, and less than 1% in the globe. The density of mast cells was highest in lid (2843/mm3), limbus (2822/mm3), and orbit (2184/mm3) and lowest in bulbar conjunctiva (794...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1979-08-01 00:00:00
abstract:PURPOSE:We evaluated whether UVA-riboflavin collagen cross-linking (CXL) increases transverse stromal shear moduli ex vivo, whether the shear moduli are greater in the anterior compared to the posterior stroma, and whether the shear moduli are affected by CXL. METHODS:The resistance to unidirectional transverse shear ...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-10710
更新日期:2013-07-26 00:00:00
abstract:Purpose:During development, the corneal epithelium (CE) and the conjunctiva are derived from the surface ectoderm. Here we have examined how, during development, the cells of these two issues become isolated from each other. Methods:Epithelia from the anterior eyes of chicken embryos were labeled with the fluorescent,...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.16-20737
更新日期:2017-03-01 00:00:00
abstract:PURPOSE:Migration of Müller glial cells is enhanced in proliferative retinopathies, but the mechanisms involved are ill defined. Sphingosine-1-phosphate (S1P) is a bioactive sphingolipid synthesized by sphingosine kinase (SphK), which promotes proliferation, migration, and inflammation, acting as an intracellular media...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.14-16195
更新日期:2015-09-01 00:00:00