Colossal Squid has the largest eyes of any known animal

The eye is 27 cm (11 in) wide, with a lens 12 cm (4.7 in) across. This is the largest eye of any known animal.[3] These measurements are of the partly collapsed specimen; when living the eye was probably 30[4] to 40 cm (12 to 16 in) across.[24] @Curionic