I was very young (only about 10) when I began to need glasses. I wore them full time, although the doctor told me not to do so because it would make the disease (however, by then I didn't need much focus) get worse. I'm glad I paid no attention to her words.
The first time something eerie happened was while I was playing with my friend on her front yard. We sat on a bench, looking around the street. I noticed my glasses were dirty, so I removed and wiped them. I looked to the side, facing a house, when all of a sudden; I saw a white, fog-like figure shaped much like a human, crossing the street, coming towards us. Now, you might thing it's normal, just my eyes playing tricks on me because I'm used to wearing the glasses all the time, but it was obvious that it was something else, and, like I said, I don't need much focus. I slipped my glasses back on, at first thinking it was just my eyes, but right when I placed them back on, the figure was gone. I urged for her to follow me inside, and once there I told her what had happened.
Just a few weeks later, my younger sister began telling me that she had horrible nightmares were a dark figure covered her and wouldn't let her wake up. Normally, I wouldn't believe a word of what she said, but I figured it could be true. After all, I do recall some nights were she would cry and complain in her sleep. A few nights after she told me of her nightmares, her nights of crying in her sleep where back.
I woke up quietly, being a light sleeper. Slowly and cautiously, I reached for the light switch, flipped it to 'on' and turned my attention to my sister. She was swaying and complaining, yet her eyes were closed in a deep sleep. I looked up and, to my surprise, saw the same figure that scared my sister. It was moving from bedpost to bedpost, then stopped and looked down at my sister. I was so startled I screamed, waking up my sister, who sat up alarmed and looked around, clearly confused.
I proceeded to tell her everything, thinking that maybe glasses do block my 6th sense.