The exact course of treatment depends on the individual case (the size, location of the tumor and if the tumor affects both eyes or has already spread to another parts of the body).
Over 90% of all retinoblastomas that have not spread beyond the eye are cured.
The standard treatment is radiation therapy of the eye to control tumor growth.
If the tumor is small, other therapies instead radiation are performed (cryotherapy, laser therapy, thermotherapy).

I hope the following information will be helpful:

SANKARA NETHRALAYA NOW AT KOLKATA,
No. 147, Mukundapur Em By Pass,
Kolkata-99.
Near Purva Jadavpur Thana
Ph No: 033-44013000
Mail ID : snk@snmail.org

This institute has the most modern center for treating retinoblastoma in India.

Best wishes!
Marija