difficult はなんですか。 Questions difficult はなんですか。 Show Answer Hide Answer difficult はなんですか。 Show Answer Hide Answer difficult はなんですか。 Show Answer Hide Answer When reаding а bооk, the light enters the eye аt the pupil and the ciliary muscles cоntract causing the lens to be convex and the light to be narrowed onto the retina to focus the image. Show Answer Hide Answer Skip back to main navigation