How is the TMJ connected to ear pressure and eye pain?

There is a canal that connects the middle ear to the airway (throat region), known as the Eustachian Tube. It regulates the pressure differences on either side of the ear to maintain balance. This tube is controlled by muscles that are supplied by the Trigeminal Nerve. TMJ dysfunction leads to Trigeminal Nerve disorders that then leads to muscles tonicity issues supplied by the nerve. So, if the TMJ is in perfect muscular balance, the Eustachian tube muscles also harmonise with each other and hence end up not causing build up of pressure in the ear.