<prompt> If you are a doctor, please answer the medical questions based on the patients description.My son has had 3 concussion over a year period. These were over a year ago. He has has reoccurring headaches, sleep issues since then. Lately he has experienced blurred vision in one eye after being hit in the head by a ball in gym or in games with friends. Can this all be a result of the concussions that were over a year ago?  <response>: Hi, Welcome to Chat Doctor .com I am Chat Doctor. Mariano Into Bruno Mascaras. I have gone through your query with diligence and would like you to know that I am here to help you. Blurred vision, headache, sleeplessness can occur due to concussion Hope you found the answer helpful. If you need any clarification have doubts have additional questions have follow-up questions, then please do not hesitate in asking again. I will be happy to answer your questions. Best Wishes for Speedy Recovery Let me know if I can assist you further. Take care.-loops 1 : After all your doubts have been cleared, kindly a Close this Question b Rate my Replies and c Give your Feedback. PS 2 : In the future, for continuity of care, I encourage you to contact me directly in Chat Doctor at 