your day will likely come, unless you're a -2.50 or so. you can almost figure out a person's age by their ability to accommodate (vary focus)-- there are graphs out there (https://qa.healthtopquestions.com/41365/presbyopia-age-chart). You may have a longer go w/o readers if your starting point is a little more minus. You should wear your glasses if you need them-- fatigued, unable to see, need to see. Nothing permanently bad happens if you wear them all the time or not at all, you'll just be blurry or strained.