Minimally invasive ocular medical devices use cutting-edge technologies to provide convenient, scientific and efficient solutions for visual function and visual skill assessment, visual diagnosis, visual intervention and corrective treatment, so that smart technology can truly benefit public eye health. Through the front end of the medical instrument, a medical ball with a diameter of 2-3mm is popped out at a speed of 0.3-0.9m/s, and the ball hits the eyeball with a certain force to achieve visual diagnosis, visual intervention and corrective treatment. Due to the fast movement of the ball, high-speed cameras are needed to observe the process, and then diagnose the ball when it pops out to the eyeball. The speed and displacement of the ball must be controlled to ensure and diagnose the safe trajectory of the ball.