How long to be off aspirin and Plavix before eyelid surgery?

I recently asked this question, got good responses from MD's on Real Self. The reason for me having an eyelid lift is it is greatly impairing my vision. My ophthalmologist recommended the surgery to help me see. Both eyelids are covering half of each retina. One doctor on Real Self said he did not think I needed the surgery unless it was interfering in my vision. It is impairing my vision so badly, this is not for cosmetic purposes.