Child Has No Vision In Eye, Can See Only White.
Thanks for posting your query.
It is impossible for me to know the exact cause of loss of vision in one eye without performing an examination, but from what you say it sounds like your daughter may have developed a 'lazy eye' sometimes referred to as AMBYLOPIA. If your daughter has not been able to see well from her left eye since birth, then unfortunately, despite the wonders of modern technology it is not possible to revive the vision in that eye.
The main priority at this stage therefore is to take great care with the other eye, and to attend your optician/ophthalmologist at regular intervals to maintain an up to date treatment of her symptoms.
I'm limited here with the inability to examine your daughter, hence I'll not be able to give you more information regarding the possibilities.
Hope this answers your query. I will be glad to answer the follow up queries that you have.
Wishing you good health.
Regards.