 "process paragraph : : The cornea helps to focus light. Light passes to the iris. The pupil within the iris expands or contracts to control the amount of light entering the eye. The retina converts the light that reaches the retina into an electric signal. Sends the signal to the brain. The brain translates the electrical signals into the images a person sees. ", "event : Light passes to the iris.", "entity : electric signal" 
 not exist 