Is there a connection between tmj and getting vertigo and focusing issues while on the computer? :/ on the computer- then back head starts hurting now vertigo and jaw pain and vision issues i have tmj

Not necessarily.: Not necessarily connected but TMJ pain is often severe that you may experience visual problems and vertigo due to the pain. If you are in severe pain, it would be difficult to focus.

May be opposite: Long hours at the computer, especially when coupled with bad posture, can cause all sorts of neurological and muscular symptoms. Add to this "soup" tension, clenching, grinding, in the presence of a malocclusion may manifest itself as TMJ syndrome. Visual problems, vertigo, headaches, etc, may be associated w TMJ but more probably coincidental.

Can be: You seem to have several symptoms of a tmj/tmd issue, but can't say for sure without a thorough history and exam. I would recommend a tmj/tmd specialist.

Possible: Possible. Need more information. See a TMJ/TMD expert for evaluation/recommendations. 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.