There is no evidence to suggest that wearing spectacles makes you more dependent on them. Most people need to wear spectacles more as they get older, particularly if they are long-sighted, and wearing spectacles does not increase (or decrease) this dependence. If you go short sighted when you are in your teens this is because your eyes are growing (short sighted eyes are too big) and this also tends to get worse whether or not you wear your spectacles. What people find is that, when they get their first pair of spectacles their vision is so much clearer and more comfortable with the spectacles than without them, they are reluctant to use the effort to see without them. They are then surprised when they take their spectacles off that their vision is apparently worse without them than they remember it being. In fact, their vision is not actually worse without specs than it was before they had the spectacles, but they have become accustomed to seeing more comfortably because they have spectacles.