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Our Eye Doctors

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 always have obvious symptoms. 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, both as eyeglass lenses and contact lenses.

Our 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 our doctors:


Dr. David J. Hammond

Dr. David J. Hammond is a native of Clearwater, Florida. He graduated from Emory University in Atlanta, GA in 1981 with a B.S. degree in biology. He earned his Doctor of Optometry degree from the University of Houston in 1985. He has been practicing in Austin since graduating. Dr. Hammond...

Dr. Yi-Ming Harrison

Dr. Yi-Ming Harrison is a native of Houston, Texas. She graduated from Cornell University in 1990 with a B.A. degree in psychology. Dr. Harrison received her Doctorate in Optometry from the University of Houston College of Optometry in 1994 and was inducted into the international optometric honor society, Beta Sigma...

Dr. Patrick Harrison

Dr. Patrick Harrison is a native of Sanford, Florida. He graduated from Stetson University in 1985 with a B.S. degree in biology. He served as an U.S. Army chemical officer from 1985 to 1991. Dr. Harrison received his Doctorate in Optometry when he graduated Magna Cum Laude from the University...

Dear Patient,

The health and safety of our patients, staff, and doctors are our utmost concern, so as our practice transitions back to our regular office hours, we are implementing the following COVID-19 patient policy guidelines.

Before your appointment:

  1. Please reschedule your appointment if you become unwell, experience any flu-like symptoms, or come in contact with anyone posing a threat of transmitting the COVID-19 virus.
  2. Plan on coming to your appointment alone or accompanied by one primary caregiver.
  3. Our staff will be required to wear masks when interacting with patients. Although not required per Governor Abbott’s executive order, we are recommending you wear some type of face mask or face covering during your visit.

At your appointment:

  1. Our staff will be checking your temperature upon your arrival. If you have a fever (100.4° F) or are otherwise unwell, then we will reschedule your appointment.
  2. Please practice measures for social distancing, face covering, hand hygiene, cough/sneeze etiquette, and avoid touching your face. We will provide hand sanitizer for you convenience.

Thank you for your cooperation and consideration, and please contact us with any questions or concerns at 512-336-2371 or at

We wish all of you well,

The Doctors and Staff at Balcones Eyecare