i hit the top of my head pretty hard on the support beam of a basement...... within 30 minutes i noticed a little bit of blurry vision in my right eye, upon further inspection it appeared that my eye was swollen and "half open" my pupils dilate fine, just a relaxed eyelid....... very minor "motion sickness" took advil and it reduced the pain at the point of contact........... 2 hours later, eyelid is still relaxed and general stiffness in next and shoulders.