How does the pupils response prevent eye injury?

The pupil's response to light, known as the pupillary reflex, helps protect the eye by regulating the amount of light that enters. When exposed to bright light, the pupils constrict, reducing light exposure to the retina and minimizing potential damage. This reflex also helps enhance visual acuity in varying light conditions, allowing for safer vision. Additionally, it can help shield the eye from sudden, intense light sources that could cause injury.