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Introduction about Physiology of Vision in Human – Fossil Remedies

Here you can know about the Physiology of Vision. Also understand the Processes for the Retinal Image Formation and Activation of Photoreceptors. Visit Us: https://bit.ly/31X6A47

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Introduction about Physiology of Vision in Human – Fossil Remedies

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  1. Fossil Remedies What is the Physiology of Vision?

  2. Before light can reach the rods and cones of the retina through the cornea, aqueous humor, pupil, lens and vitreous humor. The first step in Physiology of Vision Physiology of Vision is retinal image formation and activation of Photoreceptors. The resulting nerve impulses are then passed to the visual areas of the cerebral cortex cerebral cortex. retina, it must pass RETINAL IMAGE FORMATION: This requires four basic processes,  Refraction of light rays Refraction of light rays  Accumulation of the lens Accumulation of the lens  Constriction of pupil Constriction of pupil  Convergence of eyes Convergence of eyes

  3. Light rays entering the eye from the air are refracted at the anterior surface of the cornea, posterior surface of the cornea, anterior surface of the lens and posterior surface of the lens. The degree of refraction that takes place at each surface is very precise and such that rays fall at the fovea centralis.

  4. The lens of the eye is Biconvex change the focusing power of the eye by becoming moderately curved at one moment and greatly curved the next. This change in curvature known as accommodation. In far vision, the ciliary muscle contracts pulling the ciliary process and choroid forward towards the lens. This causes shortening, thickening and bulging of the lens and thereby increasing the curvatures. Biconvex. Furthermore, it has the unique ability to curvature of lens is Constriction of pupil occurs in response to light reflex involving automonic nervous system and it is purely the function of smooth muscles of iris i.e. constrictor or circular muscles of iris.

  5. CONVERGENCE IN PHYSIOLOGY OF VISION: Human eyes are such that they focus on only one set of the object (single binocular vision). This type of vision is possible due to the phenomenon called Convergence. Convergence refers to the medial movement of the two eye-balls so that they are directed towards the object being viewed. Convergence is the function of the voluntary muscles attached to the outside of the eye eye- -ball ball called extrinsic eye muscles. These are superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique and inferior oblique.

  6. STIMULATION OF PHOTORECEPTORS: After the formation of image on the retina, it is converted into nerve impulses. The steps involved in the generation of nerve potentials are activation of rhodopsin and/or iodopsin iodopsin of rods and cones respectively. Hyperpolarization occurs as a result of activation of these pigments in response to light. These impulses are then passed through optic nerve to the thalamus thalamus. Here the fibres synapse with other neurons whose axons axons pass to the visual areas of the cerebral cortex located in the occipital lobe. Also view more useful articles by PCD PCD Pharma Pharma Company Company.

  7. Thanks! Do you have any questions? 9426513688 https://www.fossilremedies.com/ CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon and infographics & images by Freepik Please keep this slide for attribution

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