From Embryology
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Fig. 462. Showing somewhat later stage in development of optic cup and lens than is shown in Fig. 461


The thickened portion of ectoderm is known as the lens area (Fig. 460). The latter next becomes depressed against the outet surface of the optic vesicle forming a distinct lens invagination (Fig. 461). This becomes cup-shaped and then its edges come together and fuse, thus forming the lens vesicle (Fig. 462). At first the lens vesicle is connected with the surface ectoderm, 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).

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Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.

Cite this page: Hill, M.A. (2019, July 17) Embryology Bailey462.jpg. Retrieved from

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