Why might the sclera of a grazing animal and eye be tougher than our own?

The sclera of grazing animals is often tougher than that of humans to provide better protection and support for their large, prominent eyes, which are adapted for wide-angle vision to detect predators. This increased toughness helps withstand environmental factors like dust, debris, and physical stress from their grazing habits. Additionally, the structural demands of their lifestyle, including the need for durability during constant movement and head positioning while feeding, contribute to the sclera's robustness.