1Compare the change in distance of the object when you move your eyes from the letters of the textbook in your hand to a distant object outside the window, such as clouds in the sky. Also compare the distance between the lens and the retina (the image distance) in these two cases.
2During the process of forming an image by a convex lens, the image distance changes with the change in object distance. Is this process possible for the eye lens too?
3In the situation where the image distance of the eye lens remains constant, how should the curvature of the lens change so that it focuses the rays of light from nearby objects as well as from the distant object exactly on the retina?
4What is accommodation of the eye?
5What happens to the ciliary muscles, the thickness of the lens and the focal length when looking at a nearby object and at a distant object? Show it in a table.
6Define far point and near point. What are their values for a normal eye?
7Why do the letters of a book held 10 cm from the eye look blurred?
8What is the least distance of distinct vision? What is the eye lens like when looking at an object at the near point?
9What is the range of vision? How does it differ between a person with no visual defect and a person with a visual defect?
10What happens to the focal length of a lens and to how strongly it bends light when its curvature increases?