The weight issue doesn't come into play until you have an accident but the vision impairment does. You can't honestly say you see as well with it on as you do off. It simply isn't physicly possible, you lose periferal vision. But it is a chioce and do what makes ya feel good.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!