Patterson Optical, P.A. 4180 Town Center Sherman, TX 75092 Hours of Operation M-F: 8:30 AM - 5:30 PM Sat: 8:00 AM - 1:30 PM Sun: Closed; Meet Our Doctors; Contact Us; Schedule an Appointment; Insurance; Patient Forms Patient Portal Patient Forms 903-868-2020; Location. Patterson Optical, P.A. 4180 Town Center Sherman, TX 75092 903-868-2020.