Structure of the human eye

When considering the anatomical structure of the human eye, it can normally be split into three categories; the outer layer, the middle layer and the inner layer.

 Eye structure 

Human eye image courtesy of Wikimedia Commons. This image is in the public domain and thus free of any copyright restrictions.

Location

The eye ball is located in a pyramidal cavity known as the orbit. Within the orbit is the eyeball, the extraocular muscles, cranial nerves II, III, IV, V (opthalmic and maxillary divisions) and VI, blood vessels, lymphatics and fat.

                            Superior orbital fissureSuperior orbital fissure

  • The roof of the orbit comprises of the frontal bone, which anteriorly contains the frontal air sinuses.
  • The lateral wall is formed anteriorly by the zygomatic bone and posteriorly by the greater wing of the sphenoid bone.
  • The floor is made up of the maxilla anteriorly and the greater wing of the sphenoid posteriorly.
  • From anterior to posterior the medial wall comprises of the maxilla, lacrimal, ethmoid and sphenoid bones.

Skull picture is courtesy of Wikimedia Commons. This image is in the public domain this free of any copyright restrictions.

 

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