Results 61 to 70 of about 19,704 (187)

In vivo imaging of the human eye using a 2-photon-excited fluorescence scanning laser ophthalmoscope

open access: yesThe Journal of Clinical Investigation, 2022
Background Noninvasive assessment of metabolic processes that sustain regeneration of human retinal visual pigments (visual cycle) is essential to improve ophthalmic diagnostics and to accelerate development of new treatments to counter retinal diseases.
Jakub Boguslawski   +15 more
doaj   +1 more source

The science of color and color vision [PDF]

open access: yes, 2021
A survey of color science and color ...
Byrne, Alex, Hilbert, David R.
core  

Rapid adaptive evolution of colour vision in the threespine stickleback radiation. [PDF]

open access: yes, 2016
Vision is a sensory modality of fundamental importance for many animals, aiding in foraging, detection of predators and mate choice. Adaptation to local ambient light conditions is thought to be commonplace, and a match between spectral sensitivity and ...
Heckman, Nancy   +4 more
core  

Carotenoid Biosynthesis in Fusarium

open access: yesJournal of Fungi, 2017
Many fungi of the genus Fusarium stand out for the complexity of their secondary metabolism. Individual species may differ in their metabolic capacities, but they usually share the ability to synthesize carotenoids, a family of hydrophobic terpenoid ...
Javier Avalos   +6 more
doaj   +1 more source

Familial grouped pigmentation of the retinal pigment epithelium. [PDF]

open access: yesBritish Journal of Ophthalmology, 1988
Grouped pigmentation of the retinal pigment epithelium was found in a father and his son. They had a normal resting potential on the electro-oculogram, but the son had a lower normal light rise. We believe this is the first description of familial grouped pigmentation.
de Jong, P.T.V.M., Delleman, J.W.
openaire   +3 more sources

Visual Responses in Mice Lacking Critical Components of All Known Retinal Phototransduction Cascades [PDF]

open access: yes, 2010
The mammalian visual system relies upon light detection by outer-retinal rod/cone photoreceptors and melanopsin-expressing retinal ganglion cells. Gnat1(-/-); Cnga3(-/-); Opn4(-/-) mice lack critical elements of each of these photoreceptive mechanisms ...
Allen, AE   +4 more
core  

Evolution and mechanism of spectral tuning of Blue-absorbing visual pigments in butterflies [PDF]

open access: yes, 2010
The eyes of flower-visiting butterflies are often spectrally highly complex with multiple opsin genes generated by gene duplication, providing an interesting system for a comparative study of color vision.
ARIKAWA Kentaro   +6 more
core   +2 more sources

Bilateral Paracentral Climatic Droplet Keratopathy in Congenital Methemoglobinemia

open access: yesTNOA Journal of Ophthalmic Science and Research
A 59-year-old woman, who is a known case of congenital methemoglobinemia, came with complaints of diminision of vision in both eyes for 2 years. The patient noticed whitish discolouration of cornea since teenage and did not undergo any ophthalmic ...
S Saudhamini   +3 more
doaj   +1 more source

Bilateral conjunctival melanocytosis and retinitis pigmentosa

open access: yesJournal of Clinical Ophthalmology and Research, 2019
Conjunctival pigmented lesions have varied appearances. It arises from the melanocytic or nonmelanocytes. It is rare to find conjunctival melanocytosis associated with retinal pigmentary dystrophy.
Rajesh Subhash Joshi   +1 more
doaj   +1 more source

Persistent activation of transducin by bleached rhodopsin in salamander rods. [PDF]

open access: yes, 1996
The hydrolysis-resistant GTP analogue GTP-gamma-S was introduced into rods isolated from the retina of the salamander Ambystoma tigrinum to study the origin of the persistent excitation induced by intense bleaching illumination.
Cornwall, MC, Fain, GL, Matthews, HR
core  

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