Sensory - Vision Development
|Embryology - 24 Aug 2019 Expand to Translate|
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- 1 Introduction
- 2 Some Recent Findings
- 3 Timeline
- 4 Lens
- 5 Stage 22 Eye
- 6 Retinotopic Map
- 7 Neural Crest
- 8 Schlemm's canal
- 9 Extraocular Muscles
- 10 Additional Images
- 11 References
- 12 Terms
- 13 External Links
- 14 Glossary Links
These notes introduce vision development of the eye: induction and regional specification of the eye structures, maturation and formation of retina and optic tectum neuronal connections.
The adult eye has contributions from several different embryonic layers eventually forming neuronal, supportive connective tissue, optical structures, and muscular tissues. Historically determined that at birth, the human eyeball volume is about 3.25 cc and the estimated weight is about 3.40 grams.
There are additional pages shown in the vision links, covering specific topics of vision development.
|Senses Links: Introduction | placode | Hearing and Balance hearing | balance | vision | smell | taste | touch | Stage 22 | Category:Sensory|
Some Recent Findings
|More recent papers|
This table allows an automated computer search of the external PubMed database using the listed "Search term" text link.
|10||optic primordia appear.|
|11||Right and left optic primordia meet at the optic chiasma forming a U-shaped rim.|
|12||optic neural crest reaches its maximum extent and the optic vesicle becomes covered by a complete sheath,|
|13||By the end of the fourth week the optic vesicle lies close to the surface ectoderm. Optic evagination differentiation allows identification of optic part of retina, future pigmented layer of retina, and optic stalk. The surface ectoderm overlying the optic vesicle, in response to this contact, has thickened to form the lense placode.|
|14||(about 32 days) Lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore.|
|15||(about 33 days) Lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.|
|16||(37 days) Growth of the lens body results in a D-shaped lens cavity. Perilental blood vessels (tunica vasculosa lentis) are visible. Prior to the development of the eyelids, one small sulcus or groove forms above the eye (eyelid groove) and another below it.|
|17 - 19||Retinal pigment is visible and the retinal fissure is largely closed. Eyelids grooves deepen, eyelid folds develop, first below, and then above, the eye.|
|18||Mesenchyme invades the region between the lens epithelium and the surface ectoderm.|
|19 - 22||Eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. The upper and the lower eyelids meet at the outer canthus in Stage 19.|
|20||Lens cavity is lost and a lens suture begins to form. The inner canthus is established.|
|23||retina comprises the pigmented layer, external limiting membrane, proliferative zone, external neuroblastic layer, transient fiber layer, internal neuroblastic layer, nerve fiber layer, and internal limiting membrane. Eyelids closure is complete (Note - shown as still open in the Kyoto embryo).|
|Data from a study of human embryonic carnegie stages and other sources.
See below the drawings of sections of the whole eye from week 8 of development.
- Carnegie stage 19 - Optic nerve small, slender. Lumen practically whole length of stalk. Few or no fibers.
- Carnegie stage 20 - Ependymal arrangement partially retained along stalk. Remnant of ependyma along whole length of stalk. Hyaloid groove at bulbar end. A few fibers arriving at brain.
- Carnegie stage 21 - Remnant of ependyma present.
- Carnegie stage 22 - Sheath layer beginning to form. Vascular canal present.
- Carnegie stage 23 - Early nerve sheath. Reticular spongioblastic framework, striate arrangement of nuclei, bundles of fibers. Definite nerve sheath.
The lens or crystalline lens or aquula (Latin, aquula = a little stream) has a key role in focussing light (with the cornea) upon the neural retina. The lens embryonic origin is from surface ectoderm of the sensory placodes that form in the head region (More? Week 4 - Placodes). The lens focusses by refracting light as it passes through the biconvex lens, which can be altered in shape (accommodation) by surrounding ciliary muscles. These ciliary muscles are activated (contracted) by parasympathetic innervation from the ciliary ganglion itself innervated by the oculomotor nerve (Cranial Nerve III) (More? Cranial Nerves).
surface ectoderm -> lens placode -> lens pit -> lens vesicle -> lens fibres -> lens capsule and embryonic/fetal nucleus.
- Links: Vision - Lens Development
Stage 22 Eye
The images below link to virtual slides of the human developing eye at Carnegie stage 22. Click on the image to open or select specific regions from the regions of interest links.
Virtual Slide - Regions of Interest
Links: Embryo Virtual Slides
This neuroscience term describes how the developing retina is precisely "mapped" onto the visual cortex through a series of signaling and activity dependent mechanisms. This follows from Hubel and Wiesel (1981 Nobel Prize in Physiology or Medicine) key discoveries (1959-70) of how in development system matching occurs in the visual system. The topographic map establishes an ordered neuronal connection between sensory structures and the central nervous system.
The retinotectal map (eye to brain) of birds (lower vertebrates):
- temporal (posterior) retina is connected to the rostral (anterior) part of the contralateral optic tectum
- nasal (anterior) retina to the caudal (posterior) tectum
- ventral retina to the dorsal (medial) tectum
- dorsal ventral (lateral) tectum
Retinal waves a form of coordinated spontaneous activity that occurs in the developing retina. These waves of electrical activity (action potentials) are thought to have a role in establishing the initial retinotopic map by correlating/coordinating the activity of neighbouring retinal ganglion cells.
EphA/ephrin-A molecular signaling also thought to have a role in establishing the initial retinotopic map.
Mouse eye neural crest
Mouse eye TGF-beta model
- Links: Image - Mouse eye neural crest | Image - Mouse eye TGF-beta model | Vision Development | Neural Crest Development | Head Development
Schematic showing the stages of Schlemm's canal development in the postnatal mouse by the novel process of canalogenesis. (Cartoons have been drawn for clarity and are not intended to suggest that most early sprouts arise from the LVP.)
Extraocular muscles are required to move the eye within the orbit. Their embryonic origin requires an interaction between the cranial mesoderm and the migrating neural crest cells.
The following is from a recent paper comparing human to zebrafish muscle development.
|About the Muscles||Legend|
- Links: Extraocular Muscles
|Historic Disclaimer - information about historic embryology pages|
|Embryology History | Historic Embryology Papers)|
- Scammon RE. and Armstrong EL. On the growth of the human eyeball and optic nerve. (1925) J. Comp. Neurol. 33(2):165-219.
- Swaroop A & Zack DJ. (2002). Transcriptome analysis of the retina. Genome Biol. , 3, REVIEWS1022. PMID: 12186651
- Ribas VT, Gonçalves BS, Linden R & Chiarini LB. (2012). Activation of c-Jun N-terminal kinase (JNK) during mitosis in retinal progenitor cells. PLoS ONE , 7, e34483. PMID: 22496813 DOI.
- Hayakawa I & Kawasaki H. (2010). Rearrangement of retinogeniculate projection patterns after eye-specific segregation in mice. PLoS ONE , 5, e11001. PMID: 20544023 DOI.
- Rapicavoli NA, Poth EM & Blackshaw S. (2010). The long noncoding RNA RNCR2 directs mouse retinal cell specification. BMC Dev. Biol. , 10, 49. PMID: 20459797 DOI.
- Pearson AA. (1980). The development of the eyelids. Part I. External features. J. Anat. , 130, 33-42. PMID: 7364662
- Streeter GL. Developmental Horizons In Human Embryos Description Or Age Groups XIX, XX, XXI, XXII, And XXIII, Being The Fifth Issue Of A Survey Of The Carnegie Collection. (1957) Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36: 167-196.
- Ittner LM, Wurdak H, Schwerdtfeger K, Kunz T, Ille F, Leveen P, Hjalt TA, Suter U, Karlsson S, Hafezi F, Born W & Sommer L. (2005). Compound developmental eye disorders following inactivation of TGFbeta signaling in neural-crest stem cells. J. Biol. , 4, 11. PMID: 16403239 DOI.
- Kizhatil K, Ryan M, Marchant JK, Henrich S & John SW. (2014). Schlemm's canal is a unique vessel with a combination of blood vascular and lymphatic phenotypes that forms by a novel developmental process. PLoS Biol. , 12, e1001912. PMID: 25051267 DOI.
- Kasprick DS, Kish PE, Junttila TL, Ward LA, Bohnsack BL & Kahana A. (2011). Microanatomy of adult zebrafish extraocular muscles. PLoS ONE , 6, e27095. PMID: 22132088 DOI.
- Kolb H, Fernandez E, Nelson R, editors. Webvision: The Organization of the Retina and Visual System [Internet]. Salt Lake City (UT): University of Utah Health Sciences Center; 1995-. Available from: http://www.ncbi.nlm.nih.gov/books/NBK11530/
- Gilbert SF. Developmental Biology. 6th edition. Sunderland (MA): Sinauer Associates; 2000. Development of the Vertebrate Eye. Available from: https://www.ncbi.nlm.nih.gov/books/NBK10024/
- Evolution of the mammalian middle ear bones from the reptilian jaw | Chick embryo rhombomere neural crest cells | Some derivatives of the pharyngeal arches | Formation of the Neural Tube | Differentiation of the Neural Tube | Tissue Architecture of the Central Nervous System | Neuronal Types | Snapshot Summary: Central Nervous System and Epidermis
- Neuroscience Purves, Dale; Augustine, George J.; Fitzpatrick, David; Katz, Lawrence C.; LaMantia, Anthony-Samuel; McNamara, James O.; Williams, S. Mark. Sunderland (MA): Sinauer Associates, Inc. ; c2001 The Auditory System | The Inner Ear | The Middle Ear | The External Ear | Early Brain Development | Construction of Neural Circuits | Modification of Brain Circuits as a Result of Experience
- Molecular Biology of the Cell (4th Edn) Alberts, Bruce; Johnson, Alexander; Lewis, Julian; Raff, Martin; Roberts, Keith; Walter, Peter. New York: Garland Publishing; 2002. Neural Development | The three phases of neural development
- Clinical Methods 63. Cranial Nerves IX and X: The Glossopharyngeal and Vagus Nerves | The Tongue | 126. The Ear and Auditory System | An Overview of the Head and Neck - Ears and Hearing | Audiometry
- Health Services/Technology Assessment Text (HSTAT) Bethesda (MD): National Library of Medicine (US), 2003 Oct. Developmental Disorders Associated with Failure to Thrive
- Eurekah Bioscience Collection Cranial Neural Crest and Development of the Head Skeleton
- Webvision: The Organization of the Retina and Visual System. Kolb H, Fernandez E, Nelson R, editors. Salt Lake City (UT): University of Utah Health Sciences Center; 1995-.
The International Journal of Developmental Biology Vol. 48 Nos. 8/9 (2004) Eye Development
Bookshelf vision development
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Cite this page: Hill, M.A. (2019, August 24) Embryology Sensory - Vision Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Sensory_-_Vision_Development
- © Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G