Laws Of Ocular Motility Flashcards
1
Q
What is donders law
A
A definite and invariable amount of torsion occurs for a given position of gaze, irrespective of how that position was reached e.g the orientation of the eye is always the same when looking in a specific direction
2
Q
What is listings law
A
Each rotation from primary position to another position involves a rotaition around a single axis lying in the equatorial plane known as listings plane
3
Q
More on Listings law:
A
- movement around horizontal and vertical meridians result in no cyclrotation movement
-BUT CYCLOROTATIONS do occur e.g from postural changes
-therefore cyclorotational movement is required to compensate.
