What could cause distorted vision and facial pain?

Many causes : One cause of your condition could be trigeminal neuralgia.Trigeminal neuralgia is an inflammation of the trigeminal nerve causing extreme pain and muscle spasms in the face. Attacks of intense, electric shock-like facial pain can occur without warning or be triggered by touching specific areas of the face. I would see someone to diagnose your problem.

Need exam: You may have one problem or possibly two different problems. It would be good to have your medical doctor see you to rule out a few things.

Evaluation Needed: The symptoms you have mentioned can from a myriad of pathology's so go to your doctor to be evaluated.

Few things: A number of things. TMJ problems can cause both pain and visual changes. However, other more serious things a can so the same. See your regular MD first. If TMJ, see a TMJ expert. Any dentist can be a TMJ expert with the proper training and experience. Most commonly, oral surgeons, prosthodontists, and orofacial pain specialists. Ask your MD, your dentist and your dental society for referrals.