Anatomy: parts of the optic nerve: practice question

The best answer is A, Intraorbital part. The intraorbital part measures about 25 to 30 mm and is S shaped to allow eye movement without traction.

The intraocular part is only about 1 mm.

The intracanalicular part is about 6 mm.

The intracranial part is about 10 mm before the chiasm.

It tests Anatomy: parts of the optic nerve in Ophthalmology. The intraocular part is about 1 mm, the canalicular about 6 mm and the intracranial about 10 mm. The longer slack in the orbital segment explains why proptosis tolerates some stretch.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

Group the red eye by what to examine and what the pupil does. Then use the flashcards and the other Ophthalmology questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.