I too made the mistake of going to Precision Vision in Acton. My progressive bifocals were not made correctly. Everything was distorted, warped and off. I FELL DOWN TRYING TO WALK WITH THEM ON and there was no way I could drive. When I took them to another optician, he informed me one lens was 4 mm off. Unacceptable in my opinion. Precision Vision had a new lens made; this pair was a little better, but everything was still warped and distorted. I could see fine with them when I placed them mid-bridge on my nose, but if I placed them on the... read full review »