No, you should not put any chemotherapy eye drops into the eye to treat choroidal nevus. This will cause more harm than good. It is a non-cancerous condition and usually requires no treatment. However yes, it does carry some risk of turning into melanoma or cancer, and in that case it will require treatment. You need to have regular eye checkup to see if the nevus is growing in size, changing color or is bleeding or shows any change that may look cancerous. Do discuss this with your eye doctor and get yourself examined as advised. Take care!