It depends. I still remember my first time of wearing contact lenses. I didn't get any discomfort. But there are some people who need a time to adjust the lenses. Besides, there still other factors can lead to blurry vision of wearing contact lenses. If you use dirty hand to wear it, it may get dirty on the lenses, thus lead to blurry vision. Besides, you may also wear contact lenses in a wrong way. For example, if you wear the contact lenses inside out, it may cause blurry vision. In addition, scratched contact lenses can also lead to blurry vision. You can have a check.