For the axis of an optical system Optical axis The opticaxis of a crystal is the direction in which a ray optics ray of transmitted light suffers no birefringence double refraction . Due to the internal structure of the crystal the specific structure of the crystal lattice , the form of atoms or molecules of its components , light propagates along the optical axis differently than in other directions. Light propagating along the optical axis of a uniaxial crystal e.g. calcite , quartz , has no unusual results. Light propagates along that axis with a speed independent of its Polarization waves polarization . If the light beam is not parallel to the optical axis, then the beam is split into two rays the ordinary and extraordinary when passing through the crystal. These rays will be mutually perpendicularly polarized. The opticaxis of a crystal is a direction rather than a single line. ref name Hecht cite book first Eugene last Hecht year 1987 title Optics edition 2nd publisher Addison Wesley isbn 0 201 11609 X page 283 ref If a ray in this direction suffers no birefringence, neither will all parallel rays. A crystal with only one opticaxis is called an uniaxial crystal. Crystals are classed according to the number of optic axes uniaxial, biaxial . An uniaxial crystal is isotropic within the plane orthogonal to the optical axis of the crystal. The refractive index of the ordinary ray is constant for any direction in the crystal. The refractive index of the extraordinary ray is variable and depends on the direction. Non crystalline materials have no double refraction and thus, no opticaxis. Some solid materials under specific conditions can demonstrate double refraction and optic axes. Notes and references references optics stub Category Polarization Category Optical mineralogy de Optische Achse Kristalloptik kk nl Optische as kristallografie ja pl O optyczna kryszta u ru uk ... more details
Wiktionary Optic may mean Alcoholic spirits measures optic , a British term for a device for dispensing fixed amounts of alcoholic spirits Optics , the study of the behavior and properties of light An optical element or component, such as a Lens optics lens , Prism optics prism , or mirror Disambiguation ... more details
wiktionarypar axisAxis may refer to In mathematics Axis of rotation , line around which an object rotates Axis of symmetry , a line that divides a two dimensional object into identical shapes X and Y axes, or X, Y, and Z axes, perpendicular lines used in the Cartesian coordinate system Informally, by extension ... Axis anatomy , the second cervical vertebra of the spine Axis genus Axis genus , a genus of deer Axis science festival , an annual technical festival held in Nagpur, India Axial tilt , the tilt of the axis on which the earth rotates, relative to the plane of the ecliptic Optical axis , a line of rotational symmetry in an optical system Opticaxis of a crystal , the direction in which a ray of transmitted light suffers no birefringence Electrocardiographic axis The American Psychiatric Association ... system five axis system In geography Axis, Alabama , an unincorporated area In aerospace industry AXIS Flight Training Systems , an Austrian based manufacturer of Flight Simulators In politics A parameter used in describing political spectrum Axis powers , Germany, Italy, Japan and their allies during World War II Axis of evil , U.S. President George W. Bush s description of Iran, Iraq, and North Korea In music Axis Bold as Love , album by The Jimi Hendrix Experience Axis Percussion , a US manufacturer of drum pedals and hardware Axis Records disambiguation , the name of several music labels Axis system , a system of harmonic analysis In fiction Axis novel , a science fiction novel by Robert Charles Wilson Universal Century AxisAxis , a colonized asteroid in the Gundam anime universe Axis Zeon, Zeon Neo Zeon movements inhabitants of the asteroid Axis in the Gundam anime universe Axis ... Apache Axis , an open source Web service framework from the Apache Software Foundation Axis ... In communication Axis A division of the Saudi Telecom Company disambig de Axis es Eje fr Axis pl Axis simple Axis ... more details
Infobox Company name PT AXIS Telekom Indonesia br AXIS logo type Private Company Private location Jakarta, Indonesia key people Erik Aas , CEO & President Director industry Telecommunications products AXIS parent homepage http www.axisworld.co.id AXIS launched its services in April 2008 and is available in more than 400 cities across all major islands of Indonesia, including Java, Sumatera, Kalimantan, Sulawesi, Bali and Lombok. Headquartered in Jakarta, AXIS is the fastest growing GSM and 3G mobile operator in Indonesia with more than 14 million mobile subscribers with a team of more than 700 highly motivated people. AXIS vision is to provide affordable communications to all Indonesians. In line with this vision, the company is aggressively expanding its services and coverage across the country. High speed mobile broadband services will be launched in major cities this year. Detailed information about AXIS is available at www.axisworld.co.id External links http www.axisworld.co.id AXIS official site http www.stc.com.sa Saudi Telecom official site http www.maxis.com.my Maxis Communications official site Indonesia mobile phone companies Asia company stub Category Mobile phone companies of Indonesia id Axis su Natrindo Telepon Seluler ... more details
Infobox musical artist See Wikipedia WikiProject Musicians name Axis Of image alt caption origin Portstewart , Northern Ireland genre Alternative rock br Hardcore punk Hardcore years active 2008&ndash present website http www.myspace.com axisof MySpace current members Ewen Friers br Niall Lawlor br Ethan Harman background group or band associated acts And So I Watch You From Afar Axis Of are a three piece Alternative Rock band based in Belfast , Northern Ireland . The band formed in 2008... History Axis Of formed in 2008, after various line up changes they released debut single Brobdingnagain in late 2009. Since early 2010 the band have enjoyed a rise in popularity, partly due to the release of their 2nd single Port Na Spaniagh , which was released along with a music video, available on Youtube . Following one of the bands UK tours in early 2010, Rock Sound Magazine dubbed them the most exciting band to come out of Northern Ireland, possibly ever & gave them a 9 10 rating for their live performance at a show in Newcastle upon Tyne Newcastle . As a result of this coverage the band were subsequently asked to take part in a Maida Vale Studios session in January 2010. Members Niall Lawlor Guitar, Vocals Ewen Friars Bass Guitar, Vocals Ethan Harman Drums External links http www.myspace.com axisof Official Myspace http www.facebook.com axisof Official Facebook http www.youtube.com watch?v 7VRJ6zGPeHc Port Na Spaniagh Music Video http www.bbc.co.uk programmes p00d7xm9 Maida Vale Session References http www.facebook.com topic.php?uid 168735498365&topic 13512 http www.bbc.co.uk programmes p00d7xm9 http issuu.com feilebelfast docs august 2010 http www.feilebelfast.com http www.drop d.ie legacy 1672 2017 Categories Category Articles created via the Article Wizard Category Rock music groups from Northern Ireland ... more details
Wiktionary Optic Nerve may refer to Optic nerve , the anatomical structure Optic Nerve comic , the comic book series Optic Nerve 1999 , a Red Hot Benefit Series tribute to David Wojnarowicz Disambiguation ... more details
unreferenced date September 2009 Optic crystals are crystals that can be used to direct a beam of light . Optic crystals can work as directional guides to the light in photonic devices. Opticmechanics deals with the grinding, polishing and refining of optic crystals. DEFAULTSORT Optic Crystals Category Fiber optics optics stub ... more details
Unreferenced stub auto yes date December 2009 Infobox Brain Name Optic tract Latin tractus opticus GraySubject 189 GrayPage 814 Image Gray773.png Caption The left optic nerve and the optic tracts. Image2 Caption2 IsPartOf Visual system Components Artery Vein BrainInfoType hier BrainInfoNumber 443 MeshName MeshNumber NeuroLex Optic tract NeuroLexID birnlex 1684 DorlandsPre t 15 DorlandsSuf 12817061 The optic tract is a part of the visual system in the brain . It is a continuation of the optic nerve and runs from the optic chiasm where half of the information from each eye crosses sides, and half stays on the same side to the lateral geniculate nucleus . Right vs. left The relationships of the retinal fibers to the optic tracts are illustrated below, with the nasal retinal fibers in blue and the temporal retinal fibers in red. File Gray722.png thumb Click for a larger image. class wikitable optic tract temporal retinal fibers nasal retinal fiber right optic tract from the right eye from the left eye left optic tract from the left eye from the right eye In split brain patients whom have undergone a corpus callosotomy usually to treat severe epilepsy the information from one optic tract does not get transmitted to both hemispheres. In carefully controlled experiments, split brain patients shown an image in his or her left left visual field that is, the left half of what both eyes see ... optic tract will cause right sided homonomous hemianopsia . Additional images gallery Deleted image removed Image Optic tract.JPG Optic tract. Image Hippocampus brain .jpg Diagram of hippocampus Image ... lateral view. Image Gray722.png Scheme showing central connections of the optic nerve s and optic tracts ... brainstem anterior view 2 description.JPG Human brainstem anterior view Image Optic tract and optic nerve.jpg Optic tract and optic nerve gallery Visual system Sensory system Cranial nerves DEFAULTSORT Optic Tract Category Visual system Neuroscience stub it Tratto ottico pl Droga wzrokowa th ... more details
Infobox disease Name Optic neuropathy Image Alt Caption DiseasesDB ICD10 ICD10 H 46 h 46 ICD9 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID The optic nerve contains axons of nerve cells that emerge from the retina, leave the eye at the optic disc, and go to the visual cortex where input from the eye is processed into vision. There are 1.2 million optic nerve fibers that derive from the retinal ... 6, 353 361. ref Optic neuropathy refers to damage to the optic nerve due to any cause. Damage and death of these nerve cells, or neurons, leads to characteristic features of optic neuropathy .... On medical examination, the optic nerve head can be visualised by an ophthalmoscope. A pale disc is characteristic of long standing optic neuropathy. In many cases, only one eye is affected and patients .... Optic neuropathy is often called optic atrophy , to describe the loss of some or most of the fibers of the optic nerve. In medicine, atrophy usually means shrunken but capable of regrowth , so some argue that optic atrophy as a pathological term is somewhat misleading, and the term optic neuropathy should be used instead. In short, optic atrophy is the end result of any disease that damages nerve ... system . Causes The optic neuropathy may be caused by any of the following Ischemic optic neuropathy Optic neuritis Compressive optic neuropathy Infiltrative optic neuropathy Traumatic optic neuropathy Mitochondrial optic neuropathies Nutritional optic neuropathies Toxic optic neuropathies Hereditary optic neuropathies Each of these topics is discussed in a subsection below. Ischemic optic neuropathy In ischemic optic neuropathies, there is insufficient blood flow ischemia to the optic nerve. The anterior optic nerve is supplied by the short posterior ciliary artery and choroidal circulation, while the retrobulbar optic nerve is supplied intraorbitally by a pial plexus, which arises from the ophthalmic .... Ischemic optic neuropathies are classified based on the location of the damage and the cause ... more details
Infobox Embryology Name PAGENAME Latin pedunculus opticus GraySubject 224 GrayPage 1001 Image Gray864.png Caption Transverse section of head of chick embryo of fifty two hours incubation. Image2 Gray865.png Caption2 Optic cup and choroidal fissure seen from below, from a human embryo of about four weeks. Optic stalk labeled at center left. System CarnegieStage 14 Precursor GivesRiseTo MeshName MeshNumber Code Terminologia Embryologica TE E5.14.3.4.2.2.6 The optic vesicles project toward the sides of the head, and the peripheral part of each expands to form a hollow bulb, while the proximal part remains narrow and constitutes the optic stalk . Closure of the choroid fissure in the optic stalk occurs during the seventh week of development. The former optic stalk is then called the optic nerve. ref Kaplan Qbook USMLE Step 1 5th edition page 55 ref The Bottom Line the optic stalks are the structures that precede the optic nerves embryologically. References reflist External links EmbryologyUNC eye 012 http www.vision.ca eye o.cup.l.vesicle.html Overview at vision.ca eye stub Gray s Development of eye and ear Category Embryology of nervous system Category Eye ... more details
Infobox Bone Name Optic foramen Latin canalis opticus, foramen opticum ossis sphenoidalis GraySubject 35 GrayPage 147 Image Orbita mensch.jpg Caption 1 Ethmoidal foramina Foramen ethmoidale BR 2 Optic foramen Canalis opticus BR 3 Fissura orbitalis superior BR 4 Fossa sacci lacrimalis BR 5 Infraorbital groove Sulcus infraorbitalis BR 6 Inferior orbital fissure Fissura orbitalis inferior BR 7 Infraorbital foramen Foramen infraorbitale Image2 Gray193.png Caption2 Base of the skull. Upper surface. On the left, Optic foramen is the 12th label from the top. System MeshName MeshNumber DorlandsPre c 04 DorlandsSuf 12208747 The optic foramen is the opening to the optic canal . The superior surface of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove optic groove , above and behind which lies the optic chiasma the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery with accompanying sympathetic nerve fibres into the orbital cavity . The left and right optic canals are 25mm apart posteriorly and 30mm apart anteriorly. They are funnel shaped narrowest anteriorly . Additional images center gallery Image Orbital bones.png The seven bones which articulate to form the orbit. Image Gray145.png Sphenoid bone . Upper surface. Image Gray192.png Medial wall of left orbit. Image Gray787.png Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure. File Optic canal.jpg Optic canal gallery center See also Foramina of skull External links SUNYAnatomyLabs 29 os 05 01 UMichAtlas eye 6 look for 3 PSUAnatomy skel internal2 look for 10 Gray s Skull Foramina of skull Category Foramina of the skull musculoskeletal stub pl Kana wzrokowy sk Optick kan l anat mia ... more details
Infobox Anatomy Name Optic disc Latin GraySubject 225 GrayPage 1015 Image Gray879.png Caption Interior ... Gray880.png Caption2 The terminal portion of the optic nerve and its entrance into the human eye eyeball , in horizontal section. System MeshName Optic Disk MeshNumber A08.800.800.120.680.660 The optic disc or optic nerve head is the location where ganglion cell axons exit the human eye eye to form the optic nerve . There are no light sensitive Photoreceptor cell rods or cones to respond to a light ... spot or the physiological blind spot . The optic disc represents the beginning of the optic nerve second cranial nerve and is the point where the axons of retinal ganglion cells come together. The optic ... blind spot ref The optic nerve head in a normal human eye carries from 1 to 1.2 million neuron s from the eye towards the brain. Anatomy The optic disc is placed 3 to 4 mm to the nasal side of the fovea ... depression, of variable size, called the Optic cup ophthalmology optic cup . Clinical examination The eye ... of the optic disc using the principle of reversibility of light. A slit lamp slit lamp biomicroscopic ... is required for a detailed stereoscopic view of the optic disc and structures inside the eye. A biomicroscopic exam can give an indication of the health of the optic nerve. In particular, the eye care ..., notching in the optic disc and any other unusual anomalies. It is useful for finding evidence corroborating the diagnosis of glaucoma and other optic neuropathies, optic neuritis , anterior ischemic optic neuropathy or papilledema i.e. optic disc swelling produced by raised intracranial pressure , and optic disc drusen . Women in advanced stage of pregnancy with pre eclampsia should be screened by an ophthalmoscopic examination of the optic disc for early evidence of rise in intracranial ... eye , with the optical disc, or blind spot, at the bottom. Pale disc A normal optic disc is orange to pink in colour. A pale disc is an optic disc which varies in colour from a pale pink or orange ... more details
Inline citations date November 2011 about the anatomical structure the comic book series Optic Nerve comic the album about David Wojnarowicz Optic Nerve CD ROM Infobox nerve Name Optic Nerve Latin nervus ... The left optic nerve and the optic tract s. Innervates from which the eye stands alone. Special Contributions ... BranchTo MeshName Optic Nerve MeshNumber A08.800.800.120.680 Cranial nerves short The optic nerve ... the embryo nic retinal ganglion cell , a diverticulum located in the diencephalon , the optic nerve doesn t regenerate after transection. Anatomy The optic nerve is the second of twelve paired cranial ... nervous system , and are encased within the meninges . The name optic nerve is, in the technical sense, a misnomer, as the optic system lies within the central nervous system and therefore should be named the optic Neural tract tract , as nerves exist only, by definition, within the peripheral nervous system . Therefore, peripheral neuropathies like Guillain Barr syndrome do not affect the optic nerve. The optic nerve is ensheathed in all three meninges meningeal layers dura mater dura , arachnoid ... nervous system are incapable of regeneration, and, hence, optic nerve damage produces irreversible blindness. The fibres from the retina run along the optic nerve to nine primary visual nuclei in the brain, whence a major relay inputs into the primary visual cortex . The optic nerve is composed ... via the optic canal , running postero medially towards the optic chiasm , where there is a partial ... s of the optic nerve terminate in the lateral geniculate nucleus from where information is relayed ... in the orbit to 4.5 mm within the cranial space. The optic nerve component lengths are 1 mm in the globe, 24 mm in the orbit, 9 mm in the optic canal, and 16 mm in the cranial space before joining the optic chiasm. There, partial decussation occurs, and about 53 of the fibers cross to form the optic ... body, fibers of the optic radiation pass to the visual cortex in the occipital lobe of the brain. In more ... more details
Wikify date March 2010 Infobox disease Name Papillitis Image Alt Caption DiseasesDB 9579 ICD10 H46 ICD9 ICD9 377.31 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID Papillitis is the term for a specific type of optic neuritis . If ocular inflammation is restricted to the optic nerve head the condition is called papillitis or intraocular optic neuritis , and if it is located in the orbital portion of the nerve it is called retrobulbar optic neuritis or orbital optic neuritis . ref http medical dictionary.thefreedictionary.com papillitis Medical Dictionary ref Papilledema , a bulging of the optic disc, is a consequence of elevated intracranial pressure. There are some important differences between papillitis and papilledema, notably, that papillitis is more often associated with substantial losses in visual fields, pain on moving the globe, and sensitivity to light pressure on the globe. Papillitis is often an early sign of multiple sclerosis. ref Pretest Neurology Edition 6 p.259 ref References Reflist Category Neurological disorders Category Diseases of the eye and adnexa eye stub ... more details
Infobox Brain Name PAGENAME Latin recessus supraopticus GraySubject 189 GrayPage 816 Image Gray721.png Caption The hypophysis cerebri , in position. Shown in sagittal section. Optic recess labeled at upper right. Image2 Gray720.png Caption2 Median sagittal section of brain. The relations of the pia mater are indicated by the red color. Optic recess labeled at lower left. IsPartOf Components Artery Vein Acronym BrainInfoType hier BrainInfoNumber 440 MeshName MeshNumber DorlandsPre r 05 DorlandsSuf 12696889 At the junction of the floor and anterior wall of the third ventricle , immediately above the optic chiasma , the ventricle presents a small angular recess or diverticulum, the optic recess or supraoptic recess . Additional image gallery Image Gray736.png Drawing of a cast of the ventricular cavities, viewed from the side. gallery Gray s neuroscience stub Diencephalon Category Nervous system ... more details
Infobox Brain Name Optic chiasm Latin chiasma opticum GraySubject 197 GrayPage 883 Image 1543,Visalius OpticChiasma.jpg Caption Visual pathway with optic chiasm X shape outlined, red 1543 image from Andreas Vesalius Fabrica Image2 Caption2 IsPartOf Components Artery Vein BrainInfoType BrainInfoNumber MeshName Optic chiasm MeshNumber A08.800.800.120.680.600 NeuroLex Optic chiasm NeuroLexID birnlex 1416 DorlandsPre DorlandsSuf The optic chiasm or optic chiasma Greek language Greek polytonic , crossing , from the Greek polytonic to mark with an X , after the Greek letter Chi letter , chi is the part of the brain where the optic nerve s CN II partially cross. The optic chiasm is located at the bottom of the brain immediately below the hypothalamus . ref Cite book last Colman first Andrew M. edition 2nd title Oxford Dictionary of Psychology publisher Oxford University Press page 530 year 2006 isbn 0198610351 postscript None ref Pathways The images on the nasal sides of each retina cross over to the opposite side of the brain via the optic nerve at the optic chiasm. The temporal images, on the other hand, stay on the same side. This allows the images from either side of the field .... Beyond the optic chiasm, with crossed and uncrossed fibers, optic nerves become optic tracts ... Britannica 2006 Ultimate Reference Suite DVD 2009 ref Optic chiasm in cats In Siamese cat Siamese ... showing central connections of the optic nerve s and optic tracts. Image Gray724.png Base of brain ... principal subarachnoid cistern . Image Gray773.png The left optic nerve and the optic tract s. Image ... sagittal through the hypophysis of an adult monkey. Semidiagrammatic. Image ERP optic cabling.jpg 3D schematic representation of optic tracts Image Human brainstem anterior view 2 description.JPG Human ... Jeffery G title Architecture of the optic chiasm and the mechanisms that sculpt its development journal ... pt Quiasma ptico simple Optic chiasma sr sv Synnervskorsning ... more details
Infobox disease Name Optic neuritis ICD10 ICD10 H 46 h 46 , G44.848 ICD9 ICD9 377.30 ICDO Image Caption OMIM MedlinePlus 000741 eMedicineSubj radio eMedicineTopic 488 DiseasesDB 9242 MeshID D009902 Optic neuritis is the inflammation of the optic nerve that may cause a complete or partial loss of vision. Causes The optic nerve comprises axon s that emerge from the retina of the Human eye eye and carry ... cortex of the Human brain brain to be processed into vision. Inflammation of the optic nerve ... the optic nerve. Direct axonal damage may also play a role in nerve destruction in many cases. The most common etiology is multiple sclerosis . Up to 50 of patients with MS will develop an episode of optic neuritis, and 20 30 of the time optic neuritis is the presenting Multiple sclerosis signs and symptoms ... of presentation of optic neuritis is the strongest predictor for developing clinically definite MS. Almost half of the patients with optic neuritis have white matter lesions consistent with multiple sclerosis ... name pmid18541792 cite journal author last1 Optic Neuritis Study first1 Group title Multiple Sclerosis Risk after Optic Neuritis Final Optic Neuritis Treatment Trial Follow Up journal Arch. Neurol ... ref ref cite journal author Beck RW, Trobe JD title What we have learned from the Optic Neuritis ... ref ref cite journal author title The 5 year risk of MS after optic neuritis experience of the optic ... ref Some other causes of optic neuritis include infection e.g. Syphilis , Lyme disease , herpes ... dizzy. Many patients with optic neuritis may lose some of their color Visual perception vision in the affected ... of cases. ref cite journal author Boomer JA, Siatkowski RM title Optic neuritis in adults and children ... multiple sclerosis after childhood optic neuritis issue 5 ref ref cite journal last Lana Peixoto first MA coauthors Andrade, GC title The clinical profile of childhood optic neuritis journal ... S0004 282X2001000300001 ref Other remarkable differences between the presentation of adult optic ... more details
Infobox Brain Name Optic radiation Latin radiatio optica GraySubject GrayPage Image ERP optic cabling.jpg Caption Colour coded diagram showing radiations in quadrants from retinal disc through the brain Image2 Caption2 IsPartOf Components Artery Vein BrainInfoType ancil BrainInfoNumber 529 MeshName MeshNumber DorlandsPre r 01 DorlandsSuf 12686139 The optic radiation also known as the geniculo calcarine tract or as the geniculostriate pathway is a collection of axon s from relay neuron s in the lateral geniculate nucleus of the thalamus carrying visual information to the visual cortex also called striate cortex along the calcarine fissure . There is one such tract on each side of the Human brain brain . Parts A distinctive feature of the optic radiations is that they split into two parts on each side class wikitable Source Path Information Damage Fibers from the inferior retina also called Meyer s loop or Archambault s loop must pass through the temporal lobe by looping around the Lateral ventricles inferior horn of the lateral ventricle . Carry information from the superior part of the visual field A lesion in the temporal lobe that results in damage to Meyer s loop causes a characteristic loss of Visual perception vision in a superior quadrant quadrantanopia . Fibers from the superior retina also called Baum s loop travel straight back through the parietal lobe to the occipital lobe in the internal capsule retrolenticular limb of the internal capsule to the visual cortex. Carry information from the inferior part of the visual field Taking the shorter path, these fibers are less .... Image Gray746.png Diagram of the tracts in the internal capsule. Image ERP optic cabling.jpg 3D schematic representation of optic tracts gallery External links eMedicineDictionary Optic radiation cite ... s Loop of the Optic Radiation journal Am J Neuroradiology volume 25 pages 677 691 date 1 May 2004 ... Optic Radiation Category Visual system Category Central nervous system neuroscience stub fr ... more details
Infobox Embryology Name PAGENAME Latin vesicula optica vesicula ophthalmica GraySubject 224 GrayPage 1001 Image Gray863.png Caption Transverse section of head of chick embryo of forty eight hours incubation. Optic vesicle labeled at lower right. Image2 Gray977.png Caption2 Human embryo about fifteen days old. Brain and heart represented from right side. Digestive tube and yolk sac in median section. Optic vesicle labeled at center top. System CarnegieStage 11 Precursor GivesRiseTo MeshName MeshNumber Code Terminologia Embryologica TE E5.14.3.4.2.2.4 The Human eyes eyes begin to develop as a pair of diverticula from the lateral aspects of the forebrain . These diverticula make their appearance before the closure of the anterior end of the neural tube after the closure of the tube they are known as the optic vesicles . They project toward the sides of the head, and the peripheral part of each expands to form a hollow bulb, while the proximal part remains narrow and constitutes the optic stalk . Additional images gallery Image Gray460.png Head of chick embryo of about thirty eight hours incubation, viewed from the ventral surface. X 26 gallery External links EmbryologyUNC eye 012 http www.vision.ca eye o.cup.l.vesicle.html Overview at vision.ca http isc.temple.edu neuroanatomy lab embryo eye2.htm Overview at temple.edu eye stub Gray s Development of eye and ear Category Embryology of nervous system Category Eye ja ... more details
For the opticaxis of a crystal Opticaxis of a crystal Image Optical axis en.png thumb 300px Optical axis coincides with red ray and rays symmetrical to optical axis pair of blue and pair of green rays propagating through different lenses. An optical axis is a line along which there is some degree of rotational symmetry in an optics optical system such as a camera lens or microscope . The optical axis is an imaginary line that defines the path along which light propagates through the system. For a system composed of simple lens optics lenses and mirror s, the axis passes through the center of curvature of each surface, and coincides with the axis of rotational symmetry . The optical axis is often coincident with the system s mechanical axis, but not always, as in the case of off axis optical system s. For an optical fiber , the optical axis is along the center of the fiber core , and is also known as the fiber axis . See also Ray optics Cardinal point optics Boresight References FS1037C DODDIC Category Geometrical optics de Optische Achse Optik et Optiline telg eo Optika akso ko id Sumbu optis it Asse ottico nl Optische as optica ja pl O optyczna ru sk Optick os sl Opti na os tr Optik eksen uk zh ... more details
Principal axis may refer to Principal axis mechanics Aircraft principal axes Principal axis theorem Spectral theorem Principal axes of a Matrix Principal axis crystallography Optical axis disambig es Direcci n principal pt Dire o principal ... more details
Transverse axis refers to an axis which is wikt Transverse transverse side to side, relative to some defined forward direction . In particular Transverse axis aircraft For a hyperbola the transverse axis is in the same direction as the semi major axis . disambig Long comment to prevent listing on Special Shortpages.......................................................................... more details
Pitch axis may refer to In music Pitch axis music , the center about which a melody is inverted Pitch axis theory , a musical technique used in constructing chord progressions In mathematics and engineering Aircraft principal axes , the axes of an airplane in flight Yaw, pitch, and roll , a specific kind of Euler angles disambig ... more details
italic title Taxobox name Pseudoclanis axis image image width 250px image caption regnum Animal ia phylum Arthropod a classis Insect a ordo Lepidoptera familia Sphingidae genus Pseudoclanis species P. axis binomial Pseudoclanis axis binomial authority Darge 1993 ref cite web url http www.cate sphingidae.org taxonomy Pseudoclanis axis.html jsessionid B8A1B4E22226F019843E7559B9699150 title CATE Creating a Taxonomic eScience Sphingidae publisher Cate sphingidae.org date accessdate 2011 11 01 ref synonyms Pseudoclanis axis is a moth of the Sphingidae family. It is known from Cameroon . References reflist Category Pseudoclanis Smerinthini stub nl Pseudoclanis axis vi Pseudoclanis axis ... more details
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