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What are the three parts of the ectoderm involved in eye development?
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Surface ectoderm, neuroectoderm, and neural crest cells.
How do neural crest cells contribute to corneal development?
They form the corneal stroma and endothelium.
What transformation occurs to the lens vesicle during development?
It becomes the future crystalline lens.
What is the role of the neural crest cells in eye development?
They surround the neuroectoderm and form mesenchyme with the mesoderm.
Which artery initially nourishes the lens vesicle?
The hyaloid artery.
What is the significance of the optic stalk in eye development?
It becomes the future optic nerve.
What does the surface ectoderm thicken into during the lens formation stage?
The lens placode.
What do optic grooves in the forebrain develop into by the third week of gestation?
The optic vesicle.
Describe the two layers of the optic cup.
The outer layer becomes the retinal pigment epithelium, and the inner layer turns into the neurosensory retina.
What ocular structures do neural crest cells and mesenchyme form?
Sclera, Descemet's membrane, endothelium, and orbital bones.
How does the nourishment to the lens vesicle change after initial development?
It is later nourished by aqueous humor instead of the hyaloid artery/vein.
What are the neuroectoderm contributions to eye development?
Ciliary body, iris, and optic nerve.
Which germinal layers participate in the development of the eye?
Ectoderm and mesoderm; the endoderm does not participate.
What components does the surface ectoderm form in the eye?
Eyelid epithelium, corneal epithelium, eyelid skin, and glands of Krause and Wolfring.
What eye structures are developed from the mesoderm?
Extraocular muscles, sclera, various eye muscles, and blood vessel endothelium.
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