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Our Team

Eye care professionals specialize in understanding how the human eye really works, as well as diseases and conditions that affect your vision – many of which do not have obvious symptoms. Fair Oaks Ranch eye doctors know how age and risk factors affect vision over time for young and old, and they understand the benefits and features of corrective lenses including eyeglasses and contacts.

Our Fair Oaks Ranch optometrists take the time to explain the results of your eye exam, describe your options and listen to your eye care needs. Because maintaining good eye health is an ongoing partnership, we encourage you to ask questions and share your health information, which could be vital to monitoring, diagnosing and treating potential vision problems.

Meet Your Fair Oaks Ranch Eye Doctors:


Ashlynn Dennington O.D

Therapeutic Optometrist, Glaucoma Specialist

Dr. Dennington received her Bachelor in Vision Science from the University of the Incarnate Word in San Antonio, Texas. She then attended Rosenberg School of Optometry in San Antonio, Texas where she received her Doctorate of Optometry. She is a member of the Texas State Optical Family of Doctors, American Optometric Association, and Texas Optometric Association. Providing the best medical care and customer service to all her patients is Dr. Denningtons’s biggest goal, and something she strives to do every day.

Dr. Dennington is a Texas Native having grown up in Frisco, Texas. She now lives in San Antonio, Texas with her Fiancé Mike and their dog Gingi. In their spare time they love spending weekends in Oklahoma hunting, fishing and camping. When they aren’t hunting, they love taking trips to Disney World Florida with their friends and family. Her favorite time of the year is from the first day of October until the new year starts. Dr. Dennington’s hobbies include archery, dancing West Coast Swing, reading and traveling.

Rosenberg School of Optometry

Doctorate of Optometry

University of the Incarnate Word

B.S, Vision Science


Jack W. Rountree O.D.

Jack W. Rountree Jr., OD, board certified (American Board of Optometry) therapeutic optometrist and optometric glaucoma specialist, has a straightforward practice philosophy and says, “I’m proud to be part of theTSO Network of capable and caring eye doctors. My staff and I are firmly commited to give the best medical and optical care to each and every patient because, truly, this is why we are here.”Dr. Rountree specializes in the detection and treatment of medical eye conditions including Lasik and implant contact lens (ICL) evaluations as well as eye examinations for glasses and specialty contact lenses for patients of all ages. His office features a full selection of fashion frames, including designer lines.

A native Texan, Dr. Rountree earned a Doctorate of Optometry at the University of Houston College of Optometry after graduating from the University of Texas at San Antonio. He has practiced eye care at Ft. Sam Army Base in San Antonio and in eye care practices in Houston. He is actively involved in community volunteer service and with numerous professional organizations.

Your Fair Oaks Ranch Eye Care Team:

Our exceptional, friendly staff is our greatest asset. They are excited about what they do and they care personally about getting the best results for our patients.

Our receptionists will try to accommodate your busy schedule by finding appointments that suit your needs.


Mark Rivas A.B.O.C

Office Administrator

As an American Board of Opticianry (ABO) certified optician with 21 years of optical experience, Director of Operations Mark Rivas received his optical training in the US Navy at Naval Ophthalmic Service and Training Activity (NOSTRA) in Yorktown, VA. He brings to the TSO Fair Oaks practice experience in the optical laboratory, fashion framing, insurance billing, and direct patient care. Through his vast optical knowledge, he has served as an optical manager for 16 years and is very experienced in all areas in the optical dispensary.