Contact Us... If you would like any additional information or you would like to contact our office, you may do so by calling us at:  (641) 423-8861 or (800) 392-9473  Our office hours are:  Monday through Friday  7:30 a.m. until 4:30 p.m. You may also write to us at: North Iowa Eye Clinic, P.C. Hwy 122 West P.O. Box 1877 Mason City, IA 50402-1877