Histology Atlas Curriculum

The Eye

The paired eyes are a very complex sense organs that with relevant neural connections to the brain provide vision.

Learning outcomes

Your knowledge of the Eye should include the following:

  • Identify all the following structures of the eyecornea, sclera, iris, lens, ciliary body, vitreous, retina and optic nerve.
  • Understand why the cornea is clear and the sclera is opaque.
  • Understand why corneal transplantation is possible.
  • Understand the roles of the cornea and lens in focusing light onto the retina.
  • Describe the role of the ciliary muscle and the zonular fibres in accommodation of the lens.
  • Recognise the iris sphincter and dilator muscles and know their functions.
  • Recognise and understand the role of Schlemm’s canal (scleral venous sinus) in aqueous humor drainage and the cause of glaucoma.
  • Distinguish between rod and cone photoreceptor cells and know the function of each of these cells.
  • Describe the cause of presbyopia.

Learning Modules

Lacrimal gland


Optic tract

Anterior portion of the eye

Posterior portion of the eye

Chambers of the eye


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