Hi, Tooth pain especially wisdom tooth pain can lead to pain in ear, jaw and even headache. Two years is a long time thus apart from a tooth infection there maybe some underlying problem as well. Though tooth infection maybe a cause but it is not related to improper vision. The weakness may be due to low haemoglobin and iron deficiency resulting in constant fatigue. I would strongly recommend you to visit a dentist and a physician and get yourself thoroughly checked. You must also take vitamin and iron supplements if required. Also try to have green leafy vegetables and fresh fruits. Regards