Results 21 to 30 of about 185,847 (298)
Frequency responses of human magnetophosphene perception thresholds during dark adaptation point to rod modulation [PDF]
Experimental PhysiologyMagnetophosphenes are flickering lights perceived when an extremely low frequency magnetic field generates a sufficiently strong electric field in the head.
Nicolas Bouisset +4 more
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Determination of Fv/Fm from Chlorophyll a Fluorescence without Dark Adaptation by an LSSVM Model [PDF]
Plant Phenomics, 2023 Evaluation of photosynthetic quantum yield is important for analyzing the phenotype of plants. Chlorophyll a fluorescence (ChlF) has been widely used to estimate plant photosynthesis and its regulatory mechanisms.
Qian Xia +5 more
doaj +2 more sources
Shedding light on dark adaptation. [PDF]
Biochem (Lond), 2020 The retina is famous for its ability to operate under a broad range of light intensities. This is partly due to the presence of two types of photoreceptor cells, rods and cones. Rods are used mostly for dim light vision, and cones are used for bright light and colour vision. These cells are also able to adapt to a broad range of light intensities using
Weiss E.
europepmc +4 more sources
Drusen-specific dark adaptation profiles in intermediate age-related macular degeneration [PDF]
International Journal of Retina and VitreousAims To investigate the influence of macular drusen phenotypes on dark adaptation (DA) in intermediate age-related macular degeneration (iAMD). Methods This cross-sectional, multicentric study enrolled 57 eyes of 43 iAMD patients.
Paolo Forte +16 more
doaj +2 more sources
Retinal Vessel Diameter Changes in Relation to Dark Adaptation and Acute Hyperglycemia [PDF]
Journal of Ophthalmology, 2018 The purpose of this experimental clinical study was to assess the effects of dark adaptation and acute changes in glycemia on retinal vessel diameters in men.
Per Kappelgaard +3 more
doaj +2 more sources
Vision Research, 2005 The recovery of rod responsiveness after saturating flashes is greatly retarded above a certain critical level of rhodopsin bleaching (approximately 0.1%). A mathematical description of the process of turn-off of the phototransduction cascade allows attributing different phases of the recovery to specific products of rhodopsin photolysis.
Firsov, M.L. +3 more
openaire +3 more sources
Lightmasks that prevent dark adaptation for non-central diabetic macular oedema: the CLEOPATRA RCT
Efficacy and Mechanism Evaluation, 2019 Background: Hypoxia may contribute to the development and progression of diabetic macular oedema (DMO) and diabetic retinopathy. The photoreceptors are the most metabolically active cells in the retina and the rod photoreceptors consume the maximal ...
Sobha Sivaprasad +6 more
doaj +2 more sources
Metabolites, 2022 Plasma metabolomic profiles have been shown to be associated with age-related macular degeneration (AMD) and its severity stages. However, all studies performed to date have been cross-sectional and have not assessed progression of AMD. This prospective,
Ines Lains +12 more
doaj +1 more source
Foveal light and dark adaptation in patients with glaucoma and healthy subjects: A case-control study. [PDF]
PLoS ONE, 2018 To determine whether foveal light and dark adaptation are affected in glaucoma.Case-control study with 23 glaucoma patients and 51 controls. Light and dark adaptation were measured twice.
Ronald A J M Bierings +4 more
doaj +1 more source
DARK ADAPTATION IN AGRIOLIMAX [PDF]
Journal of General Physiology, 1928 A method is described which measures the excitation of Agriolimax by light, during the progress of light adaptation, by assuming that the orientating effect of continuous excitation is expressed as a directly proportionate tension difference in the orienting muscles of the two sides of the body.
W J, Crozier, E, Wolf
openaire +2 more sources