Many grazing mammals have horizontal bar shaped pupils giving them a very eerie look. What is the benefit of horizontal slit pupils like this?
Answer A wider field of view without sun bleaching occurring.
The wide slit allows the grazer to take in more light from different angles giving it a wide field of view. The fact that it is horizontal minimizes how much of the light comes from above decreasing the likelihood of sun bleaching.
Asked by Todd Curtis · Last updated 3 months ago · 10K views