Vision - Lens Development: Difference between revisions
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==Some Recent Findings== | |||
* On the growth and internal structure of the human lens.<ref><pubmed>20171212</pubmed></ref>"Growth of the human lens and the development of its internal features are examined using in vivo and in vitro observations on dimensions, weights, cell sizes, protein gradients and other properties. In vitro studies have shown that human lens growth is biphasic, asymptotic until just after birth and linear for most of postnatal life." | |||
Augusteyn RC. | |||
Exp Eye Res. 2010 Jun;90(6):643-54. Epub 2010 Feb 18. Review. | |||
PMID: 20171212 | |||
==Development Overview== | ==Development Overview== | ||
surface ectoderm -> lens placode -> lens pit -> lens vesicle -> lens fibres -> lens capsule and embryonic/fetal nucleus. | surface ectoderm -> lens placode -> lens pit -> lens vesicle -> lens fibres -> lens capsule and embryonic/fetal nucleus. | ||
==References== | |||
<references/> | |||
{{Template:Glossary}} | {{Template:Glossary}} | ||
{{Template:Footer}} | {{Template:Footer}} | ||
Revision as of 00:42, 7 June 2010
Introduction
--Mark Hill 00:27, 7 June 2010 (EST) Template page only.
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).
Some Recent Findings
- On the growth and internal structure of the human lens.[1]"Growth of the human lens and the development of its internal features are examined using in vivo and in vitro observations on dimensions, weights, cell sizes, protein gradients and other properties. In vitro studies have shown that human lens growth is biphasic, asymptotic until just after birth and linear for most of postnatal life."
Augusteyn RC. Exp Eye Res. 2010 Jun;90(6):643-54. Epub 2010 Feb 18. Review. PMID: 20171212
Development Overview
surface ectoderm -> lens placode -> lens pit -> lens vesicle -> lens fibres -> lens capsule and embryonic/fetal nucleus.
References
- ↑ <pubmed>20171212</pubmed>
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, June 26) Embryology Vision - Lens Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Vision_-_Lens_Development
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
