Final answer:
It is less complicated to diagnose vertical heterophoria because this vision disorder presents with notable symptoms directly related to the misalignment, such as double vision, which makes it easier to detect and diagnose compared to other complex vision disorders.
Step-by-step explanation:
The question "Why is it less complicated to diagnose vertical heterophorias?" can be explored by understanding the nature of vertical heterophoria, which is a type of binocular vision disorder where there is a misalignment of the visual axes of the eyes in the vertical plane.
This condition is typically easier to diagnose than other forms of vision misalignments because of the symptoms and clinical presentations it produces, such as double vision and trouble with balance and coordination that are directly related to the vertical misalignment.