Week 3: Station 1 & 2 - Orbit and Eye Flashcards
What structures pass through the optic foramen (optic canal)?
- Optic nerve
- Opthalmic artery
What 5 structures pass through the superior orbital fissure?
- Abducens nerve
- Occulomotor nerve
- Trochlear nerve
- Opthalmic division of trigeminal nerve
- Opthalmic veins
What nerve passes through the inferior orbital fissure?
Maxillary division of trigeminal
What are the main contents of the orbit?
- Eyeball
- Extrinsic ocular muscles
- Ligaments supporting the eye
- Optic nerve
- Branches of opthalmic artery
- Lacrimal apparatus
- Opthalmic veins
What are the three component parts of the eyeball?
Outer fibrous layer
Middle vascular layer
Inner sensory layer
What structures make up the outer fibrous layer and is it a complete layer?
- Cornea
- Sclera
It is a complete layer
What structures make up the middle vascular layer of the eye and is it a complete layer?
- Ciliary body
- Iris
- Choroid
Incomplete layer anteriorly as the pupil
What structures make up the inner sensory layer and is it a complete layer?
- Retina
Only present posteriorly
What is the name given to the watery fluid in the anterior segment of the eye?
Aqueous humor
What is the name given to the gel like fluid in the posterior part of the eye?
Vitreous humor
What secretes aqueous humor and where?
Ciliary body
In the posterior chamber
What are the three intrinsic muscles of the eye?
Ciliaris
Sphincter pupillae
Dilator pupillae