I had a terrible experience buying a pair of very expensive bifocals from Isthmus Eye Care. After I got the glasses I noticed that the bifocal lines were crooked and the frames did not fit my face at all. When I brought them back to be adjusted, a total of nine times in five months, the only thing that they did was bend the frames inward, which made my vision worse. They also uselessly adjusted the nose pads, and did nothing to correct the crooked bifocal lines that caused me to to develop migraine headaches and dizziness. My vision was so impaired by these glasses that I had some close calls while driving, and this was very frightening. Even though I expressed my deep concern right away nothing was done to alleviate the problem, and they falsely stated that "we tried everything possible." This was the worst customer service I have ever experienced (especially with the manager). When I went to the Walmart optical department, they were able to correct the problem in ten minutes!