THE NORMAL EYE

• Vitreous body, lens and anterior chamber is usually visible.
• Lateral rectus muscle is a thin hypoechogenic line close to the orbital surface of the zygomatic bone.
• Medial rectus muscle can be visualized along the orbital plate of the ethmoid bone.
• Visualization of the other extraocular muscles of the eye is facilitated by fetal eye movements.
• The optic nerve is a hypoechoic structure exiting the globe opposite the lens. Its medial course distinguishes it from the surrounding muscle.
• The eyelids may be visualized when the eyes are closed.

• Link to Hyaloid Vessels
• Inner orbital distance (Table) – Trout et.al. 1994
• Outer orbital distance (Table) – Trout et.al. 1994
• Inner orbital distance (Graph) – Trout et.al. 1994
• Outer orbital distance (Graph) – Trout et.al. 1994