Hi. I'm online and happy to answer your question today.
does she have any medical problems or take any medicines?
What was she doing when her vision went away? Also, was it in both eyes at once? Could she see anything or was she lights-out blind?
Did she have any other symptoms at the time? How about afterwards?
I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)
i'll get her to go and see her doctor.
thank you for your advice i will keep in touch with you and let you know the progress.