Could ocular migraine cause tinnitus? any relationship between them?

Yes: Migraine's can cause many different symptoms. They can cause tinnitus as well. It is usually due to a transient change in the cerebral blood flow.

Ocular migraines!: Yes, ocular migraines are a form of migraines that take place in the occipital cortex (part of the brain that interprets/controls vision). They lack the severe headache as common migraines. The symptoms are usually all or mostly visual and are typically described as flashing of light or ziz-zag lights in the vision. They usually last less than 30 minutes and affect the vision out of both eyes.