Yup. I will never forget when i bought my first high end multu pin slider sight. Took it home, installed it, drew it back and was like what the heck, this sight is broken, the pins are all uneven. Went back to the shop and the owner and some patrons were like, I have no idea what your talking about they look good to me. The owner said maybe it's your glasses. I was so irritated by them i walk out thinking they were crazy. Well lone and behold i went home, threw on my contacts, problem sold. I spoke about this with my dr. He said it had to do with the refracting of the lens due to how poor my vision is......-5.0.