In vivo imaging of the human eye using a 2-photon-excited fluorescence scanning laser ophthalmoscope
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]
A survey of color science and color ...
Byrne, Alex, Hilbert, David R.
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Rapid adaptive evolution of colour vision in the threespine stickleback radiation. [PDF]
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
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Carotenoid Biosynthesis in Fusarium
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]
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]
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
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Evolution and mechanism of spectral tuning of Blue-absorbing visual pigments in butterflies [PDF]
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
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
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]
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
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