Eye Doctors & Staff

Meet the experienced and friendly doctors and staff who make Werner Optometry the leading provider of vision care products and services in El Cajon.


Optometrist el cajon

Dr. Rex A. Werner

Dr. Rex Werner has been practicing in San Diego since 1989. He is a graduate of the Southern California College of Optometry, and has worked with the Department of Public Health and the Veterans Administration as well as in private practice.

In addition to being able to treat refractive disorders, Dr. Rex is certified in the treatment and management of external eye diseases. He also works with Lasik eye surgeons who are the leading experts in their field. He does pre-operative evaluations, consults, and performs post-operative follow-ups teaming with the specialists to give his patients the best care possible. Having undergone Lasik surgery himself, Dr. Rex is able to explain firsthand the pros and cons of the procedure. He also fits all types of contact lenses, including toric, bifocal, and medically necessary soft and gas permeable lenses.

Dr. Rex is happily married with four children and enjoys the great outdoors.

He is a member of the American Optometric Association, California Optometric Association, San Diego Optometric Association, Lyons’ Vision Clinic, Boy Scouts of America, Kiwanis Club, and American Sand Association.


Eye doctor el cajon

Dr. R. Aaron Werner

Dr. Aaron is the newest member in a multi-generation legacy of optometrists. In 2008, he followed his father, grandfather, and great-grandfather in becoming a doctor of optometry.

A native of Rancho San Diego, Dr. Aaron enjoys living and working in this close-knit community. He graduated from Valhalla High School and studied at San Diego State before earning his doctorate from the Illinois College of Optometry. His extensive training encompassed all aspects of optometric care including vision therapy.

His passion is working with children and it shows on the faces of all the young patients who see him. Dr. Aaron is fluent in Spanish and is available for appointments Monday through Friday.

Outside of the office, Dr. Aaron has a history of being involved with youth sports (wrestling, soccer, baseball, triathlons) and enjoys coaching his children’s teams. He is also an avid runner and triathlete, so feel free to honk and wave hi if you see him running or bicycling along the road.


Optometrist el cajon

Dr. Courtney Kness

Dr. Courtney Kness grew up on a farm in Holdrege, Nebraska where she graduated from Holdrege High School in 2002 before attending the University of Nebraska – Omaha. In 2006, she graduated with her Bachelor of Science degree in Biotechnology before moving to Chicago to attend the Illinois College of Optometry. She earned her doctorate from ICO in 2010.

She has practiced in Nebraska and California and has enjoyed seeing a diverse population of patients in both the rural and metro areas.

Dr. Kness has recently moved to the area and is looking forward to becoming part of the community. When not working at the office, she enjoys spending time outdoors with her husband and daughters.

She is a member of the American Optometric Association, California Optometric Association, Nebraska Optometric Association, and San Diego County Optometric Association.


About Our Staff
Our staff is thoroughly trained and knowledgeable in all aspects of the optical field.
They strive to ensure that your experience with us is a positive one.
Brandon, Office Manager
Kathy, Billing Coordinator
Angela, Front Desk / Optician
Kyndria, Front Desk
Mayra, Optician
Kristen, Optometric / Contact Lens Technician
George, Optometric Technician
Torrea, Optometric Technician / Optician