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Eye

  • Paul J. BryarEmail author
  • David Gu
  • Samantha Agron
  • Sarah E. Eichinger

Abstract

A fully developed eye has three layers: the outer layer is composed of the cornea and sclera; the middle layer is the uvea, which comprises the iris, ciliary body, and choroid; and the inner layer is the retina. The lens is suspended from the ciliary body by numerous zonules. Aqueous is a liquid substance that fills the anterior part of the eye, and vitreous is a gelatinous substance that fills the posterior part of the eye. Conjunctiva is a membranous structure that covers the anterior sclera and the posterior surface of the eyelids. Six extraocular muscles attach to each eye, and the optic nerve (along with its vasculature) exits through an opening in the posterior eye wall. This chapter reviews the development of the structures of the eye and the microscopic appearance of these structures throughout the fetal period.

Keywords

Ocular embryology Ocular histology Eye 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Paul J. Bryar
    • 1
    Email author
  • David Gu
    • 2
  • Samantha Agron
    • 2
  • Sarah E. Eichinger
    • 2
  1. 1.Departments of Ophthalmology and PathologyNorthwestern University Feinberg School of MedicineChicagoUSA
  2. 2.Department of OphthalmologyNorthwestern University Feinberg School of MedicineChicagoUSA

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