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The visual system performs a number of complex tasks based on the image forming functionality of the eye, including the formation of monocular images, the neural mechanisms underlying stereopsis and assessment of distances to (depth perception) and between objects, motion perception, pattern recognition, accurate motor coordination under visual ...
Visual phototransduction is the sensory transduction process of the visual system by which light is detected by photoreceptor cells (rods and cones) in the vertebrate retina.A photon is absorbed by a retinal chromophore (each bound to an opsin), which initiates a signal cascade through several intermediate cells, then through the retinal ganglion cells (RGCs) comprising the optic nerve.
The visual pathway consists of structures that carry visual information from the retina to the brain.Lesions in that pathway cause a variety of visual field defects. In the visual system of human eye, the visual information processed by retinal photoreceptor cells travel in the following way:
Visual pathway lesions From top to bottom: 1. Complete loss of vision in the right eye 2. Bitemporal hemianopia 3. Homonymous hemianopia 4. Quadrantanopia 5. & 6. Quadrantanopia with macular sparing. The visual pathway consists of structures that carry visual information from the retina to the brain. Lesions in the pathway cause a variety of ...
Sensory Systems/Visual System; Sensory Systems/Visual System/old/Sensory Organ Components; Sensory Systems/Print version; Sensory Systems/Visual Anatomy; Cognitive Science: An Introduction/Vision; Usage on en.wikiversity.org Human vision and function/Part 1: How the eye works; Korean/Words/ㄴ; Korean/Words/눈; Usage on en.wiktionary.org optic ...
Diagram of a human eye (horizontal section of the right eye) 1. Lens, 2. Zonule of Zinn or Ciliary zonule, 3. Posterior chamber and 4. Anterior chamber with 5. Aqueous humour flow; 6. Pupil, 7. Corneosclera or Fibrous tunic with 8. Cornea, 9. Trabecular meshwork and Schlemm's canal. 10. Corneal limbus and 11. Sclera; 12. Conjunctiva, 13. Uvea ...
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The tectopulvinar pathway is a fast-acting pathway that provides the viewer with information on the absolute spatial information of objects. The pathway plays a large role in directing visual spatial attention and is particularly responsive to novel stimuli that appear or move in peripheral vision; however, because it receives mostly magnocellular visual input, the tectopulvinar pathway is not ...