Well, yes, actually old people have to wear reading glasses to have reading. And we can say that they get presbyopia, which is a condition, caused by aging. When old people get this kind of disease, it will be difficult to read small words at close distances or to work on the computer for long periods of time. Of course, the most common reason why people get presbyopia, it can be related to aging. According to some researches, age-related changes will occur within the proteins in the lens, and then, it will make the lens harder and less elastic over time. That is why when we get older, the presbyopia will occur and it may become worse. And then, reading glasses are needed to have reading.