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File:Formation of the lens 1.jpg ...ing the vital role of induction from the optic cup in the formation of the lens.(1,152 × 648 (102 KB)) - 17:42, 26 September 2012File:Formation of the lens 2.jpg ...erm, forming the lens vesicle. The combined structure of the optic cup and lens vesicle can now be referred to as the optic globe.(1,152 × 648 (94 KB)) - 17:17, 27 September 2012File:Day 10.5 Deep Lens Indentation.JPG Day 10.5: Deep lens indentation occurs. Tel = cerebral hemisphere, L = lens invagination, Hl = Hindlimb bud, Aa = forelimb bud, So = Somite 4, O = otic(514 × 483 (28 KB)) - 13:00, 25 June 2014File:Lens-neural crest signaling 01.jpg ==Wnt mediates lens repression by neural crest cells and Transforming growth factor-β== # NCCs (blue) secrete TGF-βs, which signal to the non-lens ectoderm and dorsal optic vesicle.(300 × 400 (24 KB)) - 17:25, 31 August 2011File:Lens-neural crest signaling 02.jpg ==Wnt mediates lens repression by neural crest cells and Transforming growth factor-β== Proposed molecular model to explain TGF-β- and Wnt-mediated lens restriction. Broken lines: interactions inferred from the literature.(521 × 522 (22 KB)) - 14:10, 29 April 2011File:Day 11 Closure of lens vesicle.JPG Day 11: Closure of the lens vesicle occurs.(560 × 528 (27 KB)) - 13:19, 18 August 2014File:Day 11.5 Lens Vesicle completely separated from surface.JPG Day 11.5: the lens vesicle is completely separated from the surface.(511 × 484 (29 KB)) - 13:01, 25 June 2014
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File:Hertwig268.jpg ==Fig. 268. Diagram of the arrangement of the lens-fibres== ...rior surface of the lens and their termination at the anterior star of the lens ; If", continuation of the same fibres Co the posterior star on the posteri(406 × 375 (39 KB)) - 21:48, 28 March 2012File:Bailey463.jpg ==Fig. 463. Diagram of developing lens and optic cup== ...ium. The mesodermal tissue between the latter and the anterior wall of the lens vesicle is the anlage of the substantia propria cornea.(679 × 345 (52 KB)) - 06:43, 31 August 2011File:Keibel Mall 2 176.jpg ==Fig. 176. A lens at end of the third month formation of the lens sutures== ...the third month). The right upper quadrant has been removed. One sees the lens epithelium, its continuity with the lena fibres at the equator.(992 × 800 (134 KB)) - 11:34, 21 February 2014File:Bailey462.jpg ==Fig. 462. Showing somewhat later stage in development of optic cup and lens than is shown in Fig. 461== ...m, but about the eighth week a thin layer of mesoderm grows in between the lens vesicle and the surface ectoderm, completely separating them (Fig. 463).(463 × 411 (45 KB)) - 06:43, 31 August 2011File:Gray0887.jpg ==Lens Epithelium== ...the margin of the lens, showing the transition of the epithelium into the lens fibers. (Babuchin.)(221 × 800 (67 KB)) - 22:32, 19 August 2012File:DevelopmentEye-PMC43029243.jpg '''Stages of lens formation in mouse embryos''' ...nchyme; 1° and 2° LFs, primary and secondary lens fibers; PLE, prospective lens ectoderm; RPE, retinal pigmented epithelium; SE, surface ectoderm.(654 × 594 (142 KB)) - 10:06, 19 November 2017File:Hertwig264.jpg ...e between-brain (zh), is invaginated as a result of the development of the lens-pit (Ig). ...cup with double walls, an inner (ib) and an outer (ab) ; 1st, stalk of the lens ; gl, vitreous body.(653 × 395 (36 KB)) - 21:50, 28 March 2012File:Stage 22 image 207.jpg ==Developing Lens - Human Embryo Carnegie stage 22== * lens (fibres)(1,200 × 753 (208 KB)) - 11:41, 14 June 2016File:Formation of the lens 2.jpg ...erm, forming the lens vesicle. The combined structure of the optic cup and lens vesicle can now be referred to as the optic globe.(1,152 × 648 (94 KB)) - 17:17, 27 September 2012File:Hertwig267.jpg ...the eye ; I', transition of the lens epithelium into the lens-fibres ; Ic, lens-epithelium ; k, anterior chamber of the eye ; d, Descemet's membrane ; //,(700 × 701 (83 KB)) - 21:48, 28 March 2012File:Meyer1932history7 fig02.jpg (8.) The Best lens, (b) Cuffs lens No. 4, (c) an English lens No. 0. The latter was used by Ledermuller and he says that it magnified eig(655 × 1,000 (85 KB)) - 21:28, 2 November 2015File:Stage 22 image 008-eye.jpg ...ages/Stage22/08-eye/Stage22-08-eye.html?zoom=4&lat=-2030&lon=2572&layers=B Lens and Cornea] ...ages/Stage22/08-eye/Stage22-08-eye.html?zoom=5&lat=-2242&lon=2982&layers=B Lens - anterior](1,200 × 1,059 (555 KB)) - 09:26, 17 December 2016File:Bailey465.jpg ==Fig. 465. Successive stages in the development of the lens in the rabbit embryo== ...ngle layer of cuboidal cells, the anlage of the anterior epithelium of the lens (Figs. 463, 465, g, h, i).(806 × 931 (142 KB)) - 06:49, 31 August 2011File:Stage 22 image 155.jpg ==Human Embryo Stage 22 Developing Lens== ...- Developing Retina]] | [[:File:Stage 22 image 155.jpg|Image - Developing Lens]](1,000 × 672 (239 KB)) - 07:46, 31 August 2011File:Keibel Mall 2 177.jpg ==Fig. 177. Transition of the lens epithelium into the lens fibres, in a fetus at the beginning of the fourth month==(965 × 389 (48 KB)) - 11:42, 21 February 2014File:Bailey461.jpg ...epressed against the outet surface of the optic vesicle forming a distinct lens invagination (Fig. 461).(751 × 394 (54 KB)) - 06:42, 31 August 2011File:Hertwig266.jpg ...ch, choroidea ; If, lens-fibres ; le, lens-epithelium ; I' ', zone of the lens-fibre nuclei ; It, fundament of the cornea ; he, external corneal epitheliu(600 × 663 (83 KB)) - 21:48, 28 March 2012File:Gray0886.jpg ==Lens Profile== Profile views of the lens at different periods of life. 1. In the fetus. 2. In adult life. 3. In old(500 × 368 (17 KB)) - 22:33, 19 August 2012File:McMurrich1914 fig277.jpg ...layer of optic cup; sf, spaces of Fontana; si, suspensory ligament of the lens; v, vitreous humor. - (Angelucci.)(1,000 × 715 (280 KB)) - 22:36, 31 January 2017File:Bailey467.jpg ...d, the liquor Morgagni, may remain between the anterior epithelium and the lens fibers. ...the ''membrana pupillaris''. After the earlier and more rapid formation of lens fibers ceases, the hyaloid artery begins (about the seventh month) to under(946 × 515 (159 KB)) - 06:51, 31 August 2011File:Kollmann697.jpg ...h increases the glass body and later allowed to develop. Law is made the lens pouch only in passing, left through the middle.(731 × 612 (94 KB)) - 19:34, 22 October 2012File:Gray0885.jpg ==Lens== ...and arrangement of the radiating lines on the front and back of the fetal lens.(667 × 400 (20 KB)) - 22:29, 19 August 2012File:Lens-neural crest signaling 01.jpg ==Wnt mediates lens repression by neural crest cells and Transforming growth factor-β== # NCCs (blue) secrete TGF-βs, which signal to the non-lens ectoderm and dorsal optic vesicle.(300 × 400 (24 KB)) - 17:25, 31 August 2011File:Gray0884.jpg ==Lens Structure== The crystalline lens, hardened and divided. (Enlarged.)(419 × 400 (58 KB)) - 15:12, 19 August 2012File:Stage 22 image 211.jpg ==Developing Lens and Iris - Human Embryo Carnegie stage 22== * lens(1,200 × 760 (242 KB)) - 11:41, 14 June 2016File:Bailey464.jpg ==Fig. 464. Model showing lens and formation of optic cup== ...oted the fact that typical optic cup formation may occur in cases where no lens is developed. The optic cup when first formed is not a complete cup, for th(869 × 592 (67 KB)) - 06:44, 31 August 2011File:Hertwig265.jpg ==Fig. 265. Plastic representation of the optic cup with lens and vitreous body== ...its lower surface.) aus, Optic [choroid] fissure ; yl, vitreous body ; I, lens.(460 × 500 (36 KB)) - 21:49, 28 March 2012File:Bailey466.jpg ==Fig. 466. Section through optic cup and lens invagination of chick of fifty-four hours' incubation== Between the lens anlage and the pigmented layer of the retina is the broad inner layer of th(859 × 683 (139 KB)) - 15:54, 1 February 2011File:Streeter1957 fig06-19.jpg ...reous humor of the eye and forms a network on the posterior surface of the lens. X60.(1,280 × 834 (120 KB)) - 08:03, 18 April 2018File:Lens-neural crest signaling 02.jpg ==Wnt mediates lens repression by neural crest cells and Transforming growth factor-β== Proposed molecular model to explain TGF-β- and Wnt-mediated lens restriction. Broken lines: interactions inferred from the literature.(521 × 522 (22 KB)) - 14:10, 29 April 2011File:Gray0867.jpg ...enters the cup through the choroidal fissure and around the equator of the lens becomes intimately united with this reticular tissue, and contributes to fo(495 × 600 (131 KB)) - 08:59, 19 August 2012File:Streeter1957 fig06-23.jpg ...reous humor of the eye and forms a network on the posterior surface of the lens. X60. [[Category:Week 8]][[Category:Vision]][[Category:Lens]][[Category:Carnegie Embryo 4570]](1,280 × 834 (161 KB)) - 10:27, 9 May 2018File:Brown006.jpg ...into the secondary optic vesicle (see A, Fig. 7), and eventually forms the lens, which will be described later. As the lens vesicle passes into the secondary optic vesicle, some of the mesoblastic ce(800 × 543 (63 KB)) - 07:12, 31 August 2011File:Foster128.jpg # the absence at this stage of mesoblast between the lens and the epiblast ; the interval between the two has however been made too g # the arteria centralis retinae forming the vascular capsule of the lens and continuous with vascular structures round the edges of the optic cup.(998 × 859 (223 KB)) - 07:05, 17 March 2012File:Foster051.jpg ...e elongated cells are shewn at ril, now forms nearly the whole mass of the lens, the front wall being reduced to a layer of flattened cells el. ...with the mesoblast m, and appears to be the rudiment of the capsule of the lens and suspensory ligament.(722 × 847 (112 KB)) - 10:24, 11 January 2011File:Stage 22 image 212.jpg ==Developing Lens and Iris - Human Embryo Carnegie stage 22== * lens(1,200 × 753 (269 KB)) - 11:41, 14 June 2016File:Kollmann695.jpg ==Figure 695 The lens unit with a rabbit embryo== ...of capillaries. In the whole extent of the lateral surface considered, the lens plate has a recess. It therefore describes it as an Linsengrübchen (foveol(734 × 519 (45 KB)) - 10:53, 18 May 2014File:Keith1902 fig146.jpg ==Fig. 146. Diagrammatic Section of the Optic Cup and Lens==(900 × 480 (68 KB)) - 09:22, 8 January 2014File:Streeter1957 fig06-21.jpg ...reous humor of the eye and forms a network on the posterior surface of the lens. X60.(1,280 × 834 (185 KB)) - 21:14, 15 March 2017File:Streeter1957 fig06-20.jpg ...reous humor of the eye and forms a network on the posterior surface of the lens. X60.(1,280 × 834 (133 KB)) - 21:14, 15 March 2017File:Streeter1957 fig06-22.jpg ...reous humor of the eye and forms a network on the posterior surface of the lens. X60.(1,280 × 834 (181 KB)) - 21:13, 15 March 2017File:Optic cup at carnegie stage 17 .jpg Lens Cavity appears as a small moon shaped slit within the developing lens as the primary fibers slowly fill up cavity. The retina is beginning to dif(640 × 597 (297 KB)) - 21:02, 4 October 2012File:Gray0883.jpg ...ont, forming a deep concavity, the hyaloid fossa, for the reception of the lens. It is transparent, of the consistence of thin jelly, and is composed of an The Crystalline Lens (''lens crystallina'') — The crystalline lens, enclosed in its capsule, is situated immediately behind the iris, in front(616 × 700 (107 KB)) - 15:01, 23 August 2017File:Foster047.jpg ...gun to close in. Owing to this involution, which forms the rudiment of the lens, the optic vesicle is doubled in, its front portion r being pushed against ...osterior wall u and an anterior wall r. In the hollow of this cup lies the lens , now completely detached from the superficial epiblast x. Its cavity is st(484 × 315 (22 KB)) - 10:04, 11 January 2011File:Keith1902 fig143.jpg ==Fig. 143. The manner in which the Lens Vesicle is severed from the Epiblast==(475 × 456 (48 KB)) - 09:21, 8 January 2014File:Keibel Mall 2 166.jpg ...ium (His); Tr.a., truncus arteriosus; Uk., lower jaw; Z., cell mass in the lens pit.(969 × 1,000 (144 KB)) - 10:32, 21 February 2014File:Keibel Mall 2 167.jpg ...ells occur between the distal layer of the optic cup and the anlage of the lens,(1,000 × 496 (86 KB)) - 10:32, 21 February 2014File:Keibel Mall 2 168.jpg ...which is being constricted off from the epidermis. In the interior of the lens vesicle there is a mass of degenerated cells, shown more distinctly in Fig.(583 × 1,000 (65 KB)) - 10:31, 21 February 2014File:Stage15 bf1.jpg Ectoderm: sensory placodes, lens pit, otocyst, nasal pit, primary/secondary vesicles, fourth ventricle of br Head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum(1,000 × 750 (25 KB)) - 17:22, 13 May 2018File:Stage 22 image 208.jpg * lens ...vessels present during development located in the vitreous and back of the lens.(1,200 × 903 (368 KB)) - 19:14, 13 September 2017