Results 51 to 60 of about 2,749,048 (351)

A unique case of commensalism: The beaver beetle Platypsyllus castoris (Leiodidae, Coleoptera) and its morphological adaptations

open access: yesJournal of Morphology, Volume 284, Issue 1, January 2023., 2023
We document in detail the morphology of adults of the beaver beetle Platypsyllus castoris with modern techniques, and interpret evolutionary changes linked with the specific life style of the beetle in the fur of the beaver. Platypsyllus displays numerous structural specializations which ensure mechanical stabilization, firm anchorage on the host, and ...
Margarita I. Yavorskaya   +2 more
wiley   +1 more source

Non-contact, in-vivo, functional, and structural ophthalmic imaging using multimodal photoacoustic remote sensing (PARS) microscopy and optical coherence tomography (OCT) [PDF]

open access: yesarXiv, 2021
Early diagnosis of ocular diseases improves the understanding of pathophysiology and helps with accurate monitoring and effective treatment. Advanced multimodal ocular imaging platforms play a crucial role in the visualization of the ocular components and provide clinicians with a valuable tool for evaluating different eye diseases. Here, for the first
arxiv  

Dexamethasone Increases Pigment Epithelium-Derived Factor in Perfused Human Eyes [PDF]

open access: yesCurrent Eye Research, 2008
To investigate the effects of dexamethasone (DEX) on pigment epithelium-derived factor (PEDF) cDNA and secreted protein in human trabecular meshwork (TM).
Elizabeth M. Perruccio   +6 more
openaire   +3 more sources

Transcriptome Analysis of the Planarian Eye Identifies ovo as a Specific Regulator of Eye Regeneration

open access: yesCell Reports, 2012
Among the millions of invertebrate species with visual systems, the genetic basis of eye development and function is well understood only in Drosophila melanogaster. We describe an eye transcriptome for the planarian Schmidtea mediterranea.
Sylvain W. Lapan, Peter W. Reddien
doaj   +1 more source

Quantitative optical coherence tomography reveals rod photoreceptor degeneration in early diabetic retinopathy [PDF]

open access: yesarXiv, 2021
Purpose: This study is to test the feasibility of optical coherence tomography (OCT) detection of photoreceptor abnormality and to verify the photoreceptor abnormality is rod predominated in early DR . Methods: OCT images were acquired from normal eyes, diabetic eyes with no diabetic retinopathy (NoDR) and mild DR.
arxiv  

Choroidal vasculature imaging with laser Doppler holography [PDF]

open access: yes, 2021
The choroid is a highly vascularized tissues supplying the retinal pigment epithelium and photoreceptors. Its implication in retinal diseases is gaining increasing interest. However, investigating the anatomy and flow of the choroid remains challenging.
arxiv   +1 more source

Ultrastructural alterations in the retinal pigment epithelium and photoreceptors of a Stargardt patient and three Stargardt mouse models: indication for the central role of RPE melanin in oxidative stress

open access: yesPeerJ, 2018
Background Stargardt disease (SD) is characterized by the accumulation of the age-pigment lipofuscin in the retinal pigment epithelium (RPE) and subsequent neuroretinal degeneration. The disease leads to vision loss early in life.
Tatjana Taubitz   +7 more
semanticscholar   +1 more source

Neurosphere-Free Transdifferentiation of Rat Bone Marrow Stromal Stem Cells Into Retinal Cells and Retinal Pigment Epithelium

open access: yesBasic and Clinical Neuroscience, 2021
Introduction: Neurosphere-free transdifferentiation of bone marrow stem cells into Retinal Pigment Epithelium (RPE) and Retinal Cells (RCs) in vitro could offer an exceptional opportunity to study cell replacement in degenerative eye diseases.
Hamid AboutalebKadkhodaeian   +2 more
doaj  

Visual Impairment Secondary to Unilateral Isolated Epicapsular Star

open access: yesTürk Oftalmoloji Dergisi, 2014
We aimed to report a rarely observed case of unilateral epicapsular star and the visual impairment developed secondary to it. A 8-year-old girl presented with a complaint of blurred vision in the right eye; best-corrected visual acuity was 0.7 in the ...
Mehmet Serhat Mangan   +2 more
doaj   +1 more source

Mass spectrometry in ocular drug research

open access: yesMass Spectrometry Reviews, EarlyView., 2023
Abstract Mass spectrometry (MS) has been proven as an excellent tool in ocular drug research allowing analyzes from small samples and low concentrations. This review begins with a short introduction to eye physiology and ocular pharmacokinetics and the relevance of advancing ophthalmic treatments.
Eva M. del Amo   +6 more
wiley   +1 more source

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