My 3 year old has been diagonised by a doctor and told that she is having dislocation of lens.what is th remedy for this.she holds her books near.

Usually not treated: It is not clear from your question, but this may have been present at birth. A dislocated lens is a lens that has moved out of position because ligaments supporting it are weak or broken. This can lead to blurred vision which may be correctable by glasses. Obviously, the best resource for your daughter is a pediatric ophthalmologist. Trust your children's eye specialist to guide you through this.

Ectopia lentis in a : 3 Y.O. Child warrants evaluations by a geneticist & a pediatric cardiologist for connective tissue disorders (e.g., marfan's & weill-marchesani syndromes), the local school district's child find team for educational care, & close monitoring by a pediatric ophthalmologist for indications for surgery, like corrected vision <20/60, continuing slippage of the lens & associated cataracts.