Hi, Thanks for writing in. Symptoms such as numbness, headache, blurred vision and double vision should be investigated in detail. If you had an injury to the left side of your face then certain nerve injury might be suspected. However, for the eyes, getting examined by the ophthalmologist is essential. You should not ignore the problem with eyes. There are small muscles around the eyes and these help in moving the eyes in a particular direction so that you can see properly. These small muscles are supplied by specific nerves and damage to these nerves can cause problems like blurred vision or double vision. Clinical tests have to be done to make certain any problems with the nerves. Since you also complain of headaches and numbness therefore a clinical neurological examination is also suggested. After examining your your doctor might ask tests which might include CT scan of MRI scan of brain and orbits which will show details of the eyes also. Treatment depends on clinical findings. Please do not worry.