Thanks for the query..
I need to know few more details..
How old is she?
Is her vision affected recently?
Does she complain of any pain or redness
or any enlargement of the eyeball?X ray
as an investigation for eyes is rarely used nowadays.
In case of doubt you can get a CT/MRI
scan to rule out any problem.
Some normal variants can also be interpreted as whilte spots particularly in X ray.
Don't worry.Have a complete ophthalmological examination done and if required with a specialist for oculoplasty/retina
If she is having a refractive error
, she has to use glasses for better vision and also to avoid strain.
Hope this will help you. Take care..