From Embryology

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Human Embryonic Eye

Sagittal section of eye of human embryo of six weeks. (Kollmann.)

The vitreous body is developed between the lens and the optic cup. The lens rudiment and the optic vesicle are at first in contact with each other, but after the closure of the lens vesicle and the formation of the optic cup the former withdraws itself from the retinal layer of the cup; the two, however, remain connected by a network of delicate protoplasmic processes. This network, derived partly from the cells of the lens and partly from those of the retinal layer of the cup, constitutes the primitive vitreous body (Figs. 867, 868). At first these protoplasmic processes spring from the whole of the retinal layer of the cup, but later are limited to the ciliary region, where by a process of condensation they appear to form the zonula ciliaris. The mesoderm which enters the cup through the choroidal fissure and around the equator of the lens becomes intimately united with this reticular tissue, and contributes to form the vitreous body, which is therefore derived partly from the ectoderm and partly from the mesoderm.

(Text modified from Gray's 1918 Anatomy)

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Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.

Cite this page: Hill, M.A. (2024, June 17) Embryology Gray0867.jpg. Retrieved from

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current08:59, 19 August 2012Thumbnail for version as of 08:59, 19 August 2012495 × 600 (131 KB)Z8600021 (talk | contribs)==Human Embryonic Eye== Sagittal section of eye of human embryo of six weeks. (Kollmann.) (Text modified from Gray's 1918 Anatomy) {{Gray Anatomy}} Category:Cartoon Category:Senses Category:Vision Category:Human Category:Week 6

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