Visual Pathways Flashcards
Where does the optic nerve begin and end?
The optic nerve starts at the optic disc inside the eye globe and ends at the visual cortex.
What is the name of the opening in the skull that allows the optic nerve to enter into the brain cavity?
Foramen
What takes place in the optic chiasm?
Nerves from the eye that carry information from the right side of the visual field join to travel to the left side of the brain. There, they will be processed and axons that carry information from the left side of the visual field join together to travel to the right side of the brain.
What does the term amblyopic mean?
A condition whereby an eye has little or no vision, even when there is nothing physically wrong with the eye.
What part of the brain does the final processing of the image?
Visual cortex
The optical axis differs from the pupillary axis in what ways?
Optical axis of the eye: Eye components not aligned; eye does not use this path for sharp, accurate vision.
Path: Anterior & posterior pole of cornea, anterior & posterior pole of the crystalline lens, center of rotation, posterior pole of globe.
Pupillary axis: Passes perpendicularly through center of pupil; is coincident with the optic axis.
Path: Anterior and posterior pole of cornea, center of pupil, center of rotation, posterior pole of globe. There is no mention of the crystalline lens in the path of the pupillary axis.
Where does the line of sight terminate?
At the pupil
Where is the macula located on the retina?
About 3mm temporally from the optic disc is the fovea centralis, or fovea, which is in the center of the macula lutea or the macula
Which axis is used when talking about positions of the eye?
Fixation axis
Which axis are you using when looking at the center of each pupil?
Line of sight
