Seeing clearly at different distances is possible thanks to the change in the shape of the lens of the eye. The elasticity of the lens decreases with age. Therefore, middle-aged people who could seeRead more
well both at short and long distances in their younger years now need so-called reading glasses. On the other hand, people with mild short-sightedness (myopia) need reading eyeglasses later in life or not at all, and people with long-sightedness (hyperopia) need reading eyeglasses earlier.