Cataracts Treatment

I have done a retina detachment surgery in January 2006 in my right eye. Now I need to do a cataract operation due to the previous surery.
What happens if I dont do it? Will I lose my eyesight completely? Can I postpone it and do it in another year time?

My 81 year old grandmother went to see a doctor to have her cataracts remove. The doctor noticed she had excessive tearing of the eyes and said he won’t operate to remove her cataracts unless she has dacryocystorhinostomy done with another doctor. Is this totally necessary? Can anybody with a medical background or expertise please help me with this. Thank you.

my father has developed cataracts & refuses to go to doctor, will he go blind

My five year old cat has been diagnosed with cataracts. Should he have surgery? It costs close to $5000 for both eyes. How can I raise the money fast?