Blind cat reacts to rustling

Nature sometimes makes evil jokes. Someone at birth may be very unlucky. Like for example this cat Musske.
She lives with her grandmother and keeps her company after the death of her grandfather. She was born with visual impairment. Her pupils are constantly greatly dilated. She sees no obstacles and only responds to smell and sound. And on the video, her attention was attracted by the rustling sound of a felt-tip pen with which the wife painted the antistress coloring book.