From this binocular extension of Listing 's law , it follows that vergence can lead to a change of cyclotorsion .
While Listing 's law holds only for eyes that fixate a distant point ( at optical infinity ) , it has been extended to include also vergence .
From this binocular extension of Listing 's law , law follows that vergence can lead to a change of cyclotorsion .
While Listing 's law holds only for eyes that fixate a distant point ( at optical infinity ) , it has been extended to include also vergence .