Optic nerve

There are many structures in the eye, some of which include; the retina, rods and cones, the macula, the central fovea, the cranial nerve, the optic chiasm and the lateral geniculate nucleus. The retina is a layer at the back of the eye containing cells that are sensitive to light, it triggers impulses through the optic nerve. Rods and cones are specialized receptors which sense light and color. The macula is an area about the diameter of a pencil head and is close to 100 times more sensitive to

OPTIC NERVE WHAT IS THE OPTIC NERVE? It is the second pair of many cranial nerves that connects the eyes to the brain. The optic nerve is responsible for transmitting visual information from the retina to the vision centers of the brain by using electrical impulses. These impulses are dispatched through the optic nerve to the brain, which interprets them as images. Some alternative names that this nerve is called is the second cranial nerve or cranial nerve II. WHAT IS IT MADE OF? Each optic nerve

color and resolution. INFLAMMATION OF THE OPTIC NERVE Because nearly ½ of the fibers in the optic nerve are from the fovea, inflammation of the nerve will affect color perception and resolution in the central vision in the ipsilateral eye. LESION OF THE OPTIC NERVE A lesion that destroys the optic nerve will destroy all input from that retina, leading to monocular visual loss (blindness in that eye). LESION OF THE OPTIC CHIASM A lesion of the optic chiasm will destroy the fibers from the medial

Better understanding of glaucoma, requires assessment of the different components incorporate ,retinal nerve fiber layer (RNFL), and, and visual function. On the other hand, elevated intraocular pressure, are not only risk factor of glaucoma .RNFL thickness measured by optical coherence tomography (OCT) is a reliable early marker of glaucoma[1,2]. As the pathogenesis of glaucoma involves the degeneration of axons as well as cell bodies and dendrites, The primary site of axonal damage in glaucoma

Signs/Symptoms: The way a person would know if they have Glaucoma, an eye disease that can make someone go blind, is by looking for the signs or symptoms. Symptoms of Open Angle Glaucoma are patchy blindness spots in the peripheral or central vision and “tunnel” vision in both eyes. The symptoms for Acute Angle-Closure Glaucoma are, as said by Glaucoma - Symptoms and Causes by The Mayo Clinic “eye pain, nausea and vomiting, blurred vision, “halos” around lights - which may be rainbow,” red eyes,

and 12. transmembrane and coiled-coil domains 1 (TMCO1) 3e. Genes identified in GWAS with optic nerve/disc paramters as the quantitative trait: As mentioned before, glaucomatous optic neuropathies are recognized by changes in the characteristics of the optic nerve head, or optic disc, caused by loss of retinal ganglion cells and thinning of the retinal nerve fibre layer. GWAS utilizing quantitative optic nerve parameters have so far yeilded 28 genes and genomic regions as listed in Table 1D. 3f

"Glaucoma is a condition that causes damage to your eye's optic nerve and gets worse over time". (WebMD) Glaucoma is interlinked with the pressure in the eye. No one knows the exact cause of the glaucoma. Doctors think the main cause of the glaucoma is the pressure in the eye. Some people with the normal eye pressure also suffer with glaucoma. There are different kinds of glaucoma such as open angle glaucoma, Angle closure glaucoma, Normal tension glaucoma, Congenital and infantile glaucoma, and

treatment it can delay the use of daily eye drops. Laser treatment is use to clear or open up the drainage canals that are lowering the movement of fluid in the eye. By clearing it up the eye pressure is lowered stoping the damage being caused to the optic nerve. Yet the effect of laser treatment is not permeant and the patient will eventually need to use eye drops. It is popular belief that if a person has glaucoma they can smoke a lot of medical marijuana. It maybe true that smoking marijuana can lower

also called proptosis, is a condition where one or both eyes move forward. The eyes look as if one or both eyes are bulging or popping out. When the eyes are pushed forward, damage can be done to: The main nerve between the eye and the brain that contains the nerves for vision (optic nerve). The muscles that make the eye move. The inside of the eye from increased pressure (glaucoma). The front surface of the eye (cornea) because of exposure and dryness. CAUSES Exophthalmos is most

visual stimulation making them ideally suited for motion detection. By contrast, P-cells are smaller, located in the fovea, react more slowly to stimuli, and are suited to fine-detail vision. Impulses from the retina then travel via the optic nerve