Michael Dinh, O.D. Optometrist inside Rohnert Park Costco is a family-run optometry practice providing comprehensive eye exams, contact lens exams, and eyeglass prescriptions at reasonable prices. With over 40,000 eye exams performed, our experienced doctor specializes in "challenging" contact lens fits and keeps up-to-date with the latest contact lenses. We operate independently, allowing us to provide personalized attention and care to each patient.