Multifocal Eyeglass Lenses - issues and questions

I was charged $1200 for two pairs of multi-focal lens glasses. Before health insurance and other deductions the cost was about $1600. Two days later, I negotiated a lower price with them meaning that in the end I paid $1000. Checked with friends and other optometrists in our area and found that multi-focals are very expensive indeed. Feeling ripped off. Is there anything that can be done? I am retired and not eligible for government entitlements.