First, buy your reading glasses as soon as you get your glasses prescription, many older people do not wearing reading glasses whey they have problems with presbyopia, this will add to the reading difficulties, resulting in dizziness and other symptoms of bulging eyes, the impact of life and work. As time goes, the original prescription would be not is accurate for the reading glasses, you have to re-get your glasses prescription and buy new reading glasses.
You must get your reading glasses prescription first, then buy the glasses, do not try this and that, wearing improper prescription glasses will make your eye worse. (more reading glasses…)