My mother says she has strong emotional rushes and her life flashes before her eyes and feels like a star is bursting inside of her, is this a mental disorder?

Needs to see doctor. We need more information to be able to answer this. Given these symptoms she needs a good neurologic exam, good eye exam and an assessment of her hormonal status.
Starbursts. This is no the flashers that you see when you worry about a retinal detachment, so let's put it this way, to be polite--it's not an eye problem! :).