The blurred vision is not related to what you eat. The blurred vision is caused by the decline of eye regulation as we age, resulting in inadequate regulation when looking at close objects. In this case, you should first go to the hospital for an optometry to see if you have presbyopia or a relatively high degree of farsightedness. If there is such a degree, you need to get a pair of suitable glasses. The glasses should be worn according to the distance of the daily work, for example, some people are near distance may be 30cm, some people may be 50cm, according to their reading comfortable distance to choose to wear glasses. Presbyopic glasses can only be used to look close, not to watch TV, and not to walk with. If you are far-sighted while wearing presbyopic glasses, you should also have a pair of far-sighted glasses for distance viewing, so that it does not affect your daily life.