How do u differentiate between tia and ocular migraine ?

Very different: Transient ischemic attacks (TIAs) are caused by a transient clot, usually not causing permanent damage to the brain. About 1/3 of those who experience TIAs go on to have a stroke in the year following their TIA. Ocular migraine is a rare condition. It causes vision loss less than an hour and is thought to be caused by spasms in blood vessels in the retina and cellular communication changes.

Migraine: A TIA ( transient ischemic attack or "ministroke") will not typically involve headache pain. Both TIA and ocular migraine could involve temporary loss of vision, resolving in the span of minutes to 1-2 hours. Neither will be detected on MRI or CT scan of the brain. The ocular migraine would be more likely to involve pain, nausea, seeing wavy lines, and light or sound sensitivity.

Ocular migraines!: 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.