DR. Duncan and Associates

8190 Mango Avenue, Fontana CA 92335

Open 8:30am to 5:00pm, Monday through Friday.


Office building front


  • Wendy Duncan O.D.
  • Teresa Sanchez O.D.
  • Cathy Nguyen O.D.

Since its founding in 1973 by Doctor William Kragness, our practice has been serving the families of Fontana. Doctor Duncan joined the practice in 1993 and Doctor Kragness retired in 2007. In 2013 we moved from our original location to 8190 Mango Avenue. In our new, larger facility we can better accommodate our patients' needs.

Our friendly, bilingual staff is always ready to assist patients, whether making an appointment, answering questions, or help in selecting a stylish frame.

We accept most major insurance plans.

  • Vision Service Plan
  • Medical Eye Services
  • Spectera
  • Cigna
  • Blue Cross
  • Medicare
  • Medical

Photo of staff

We carry a wide selection of designer frames.

  • Dolce & Gabbana
  • Coach
  • RayBan
  • Guess
  • Candies