In our parents' generation, there are less people have the eyesight problem, because the digital products were not so developed at that time, but nowadays, with the development of these products, more and more people have the problem of short eyesight.
In the city, there are so many building that they cover people's eyesight, what's more, the environment is polluted so heavy that the sky is grey.
However, the hag had weak eyesight and was unable to see well.
