You might consider getting a second (and third?) opinion(s) from other surgeons who are experienced with the ReStor lens.
It is important to be patient following cataract surgery, especially with a multifocal implant. This can be more difficult with a multifocal implant in only one eye. However, I would not recommend undergoing surgery in your second eye until your vision has stabilized and the prescription of the eye is known. I would go back to your doctor or at the very least, call his/her office and get your questions answered. Why is he/she recommending a piggyback lens? What is the prescription of the eye? Can you read in bright light? Other options if the prescription is further away than desired is laser vision correction, a contact lens, or spectacles.
If the prescription is "further away", does that mean if I need a stronger distance perscription than I have currently? I cannot read in any light without reading glasses. Also I am still wondering if a piggyback lens (supposedly to give me more power) would work with a multifocal. Has anyone heard of this? Of course I am still hopeful that I will have some improovement, but I honestly miss my variable bifocals glasses. Thanks for your help. I do have an appointment tomorrow.