Hi, Vankata Subrhyamanyam,
Lazy eye can be treated at this age,as age advances it may not respond to treatment.
As she is having + 6 numbers may be reduced.If development of eye ball is less in comparison with development of eye ball socket,plus number may be there but gradually with development this refrection of error may be corrected.
You consult ophthalmologist
and seek his advice.
ok and bye.